4 Billion Years On

Canada Climate – August 2026 Update

Top 5 Cities: Toronto, Montreal, Vancouver, Calgary, and Ottawa

Temperature, rainfall and emissions data for Canada

A fresh climate update for Canada is being generated…

The new monthly summary is being written by Gemini in the background. This usually takes 5–10 seconds. The live climate data below is already up to date.

At a Glance

Temperature – Average

Canada
Global
Land + Ocean
Aug
+1.7°C· 5th
13.2°C
+1.2°C· 1st
16.9°C
Record
13.6°C (2024)
16.9°C (2026)
Jun–Aug
+2.0°C· 2nd
13.3°C
+1.1°C· 1st
16.8°C
Record
13.5°C (2023)
16.8°C (2026)
2025
+2.1°C· 6th
-2.5°C
+1.0°C· 3rd
15.0°C
Record
-1.7°C (2010)
15.2°C (2024)
Headline: anomaly vs your selected baseline (falls back to the 1961–1990 mean for a column without enough history for it) · Small figure: the actual value · Record = value on record for the ranking above

Climate Insights – Canada

Precipitation, Sunshine, Frost and Snow are converted to standard deviations from their own average so they can share an axis with Temperature anomalies.

Metric
Insight
10-Yr AverageActual Year

Climate History

1912Volcanic

Novarupta (Katmai) eruption

The largest volcanic eruption anywhere in the world in the 20th century - 13 km3 of magma, about thirty times the 1980 Mount St. Helens eruption - at Novarupta in Alaska on 6-8 June 1912. Ash reached 100,000 ft and cooled the Northern Hemisphere by roughly 0.3°C over 1912-13. Unlike a tropical eruption such as Pinatubo, a high-latitude eruption's haze stays in its own hemisphere, so it did little to the Southern Hemisphere.

Smithsonian Global Volcanism Program, Alaska Volcano Observatory, National Park Service, Oman et al. 2005

1945Industrial Aerosol

Post-WWII industrial expansion begins

After the Second World War, coal and oil use grew rapidly across Europe, North America and the Soviet Union. Global sulphur dioxide emissions rose from about 30 to about 130 million tonnes a year by 1980, and the sulphate haze they formed masked part of the greenhouse warming underneath - the effect known as 'global dimming'.

Klimont et al. 2013

1950-2025ENSO

How much ENSO really controls Canada's climate

ENSO matters in Canada more than its national average suggests. El Niño brings milder winters to western and central Canada and La Niña colder ones, according to Environment and Climate Change Canada, but the Atlantic provinces and the Arctic respond weakly, so the all-Canada figure dilutes the signal - in this site's data ENSO explains only about 9% of the year-to-year swing in Canada's January-March temperatures.

NOAA CPC

1955-56ENSO

The 1955-56 La Niña

Canada's temperatures for January-March 1956 ran -0.6°C against the 1961-90 average - the cool January-March that La Niña usually brings here.

ONI -1.6°C · RONI -1.4°C

NOAA CPCENSO Tracker

1958GHG Milestone

Keeling Curve begins

Charles David Keeling begins continuous measurements of atmospheric CO₂ at Mauna Loa Observatory in Hawaii, starting at about 315 ppm. The record has risen every year since and is now the longest unbroken direct measurement of CO₂ anywhere - the 'Keeling Curve'.

NOAA GMLGreenhouse Gases

1963Volcanic

Agung eruption

Agung's eruption in Bali put a veil of sulphate haze into the stratosphere that cooled global temperature by about 0.3°C over 1963-66.

Smithsonian Global Volcanism Program, NOAA Global Monitoring Laboratory

1972-73ENSO

The 1972-73 El Niño

Canada's temperatures for January-March 1973 ran +0.9°C against the 1961-90 average - the warm January-March that El Niño usually brings here.

ONI +1.8°C · RONI +2.0°C

NOAA CPCENSO Tracker

1972Other

1972: Canada's coldest year

1972 is Canada's coldest year since national records began in 1948, 1.9°C below the reference average, and it is also the coldest in this site's 1950-2025 record. No year since has come close.

Government of Canada

1973-74ENSO

The 1973-74 La Niña

Canada's temperatures for January-March 1974 ran -2.5°C against the 1961-90 average - the cool January-March that La Niña usually brings here.

ONI -2.0°C · RONI -1.9°C

NOAA CPCENSO Tracker

1975-76ENSO

The 1975-76 La Niña

Canada's temperatures for January-March 1976 ran -0.7°C against the 1961-90 average - the cool January-March that La Niña usually brings here.

ONI -1.6°C · RONI -1.1°C

NOAA CPCENSO Tracker

1977Ocean Oscillation

Pacific Decadal Oscillation flips to a warm phase

The Pacific Decadal Oscillation - a slow natural cycle in North Pacific sea temperatures - switches from its cool to its warm phase in 1976-77. The change was abrupt enough to be called the 1976-77 Pacific Climate Shift: it warmed Alaska and the west coast of North America, and reorganised North Pacific fisheries.

Learn more →

1979Industrial Aerosol

Global SO2 emissions peak

Global sulphur dioxide emissions peak at about 130 million tonnes a year, then begin a long decline as Europe, North America and Japan clean up their air. As the aerosol mask thins, the rate of global warming picks up through the 1980s.

Klimont et al. 2013

1982Volcanic

El Chichón eruption

A sulphur-rich eruption in Mexico whose aerosol cloud stayed in the stratosphere for more than two years, cooling the Northern Hemisphere by about 0.2°C.

Smithsonian Global Volcanism Program

1982-83ENSO

1982-83 El Niño

Canada's temperatures for January-March 1983 ran +0.3°C against the 1961-90 average - the warm January-March that El Niño usually brings here. On NOAA's Relative Oceanic Niño Index this is the strongest El Niño since 1950.

ONI +2.1°C · RONI +2.4°C

NOAA CPC, NOAA CPC (2)ENSO Tracker

1985Other

The Antarctic ozone hole is discovered

British Antarctic Survey scientists Joe Farman, Brian Gardiner and Jon Shanklin publish their Halley and Faraday measurements on 16 May 1985, showing October ozone over Antarctica had fallen to about two-thirds of earlier decades. The cause is traced to chlorofluorocarbons, and the finding triggers the fastest international environmental response on record.

Nature, UKRI

1987Other

The Montreal Protocol

Signed in 1987 to phase out ozone-depleting chlorofluorocarbons, the Montreal Protocol turned out to be one of the most consequential climate treaties ever agreed. CFCs are potent greenhouse gases in their own right, and NOAA estimates the Protocol prevented up to 2°C of warming by 2100 - around 1°C from the emissions avoided, and up to 1°C more by sparing forests and other carbon sinks from increased ultraviolet radiation.

NOAA, Wikipedia

1988GHG Milestone

CO₂ crosses 350 ppm

Atmospheric CO₂ passes 350 ppm. In the same year James Hansen told a US Senate committee that global warming was already detectable, the moment it entered mainstream politics. Twenty years later, in 2008, Hansen proposed 350 ppm as the safe upper limit - a level the world had already left behind.

NOAA GMLGreenhouse Gases

1988-89ENSO

The 1988-89 La Niña

Canada's temperatures for January-March 1989 ran -1.1°C against the 1961-90 average - the cool January-March that La Niña usually brings here.

ONI -1.9°C · RONI -1.9°C

NOAA CPCENSO Tracker

1990Pattern Shift

Daytime warming catches up with the night-led pattern

Across 1961-90, 81% of the world's land saw nights warming faster than days. Across 1991-2020 the pattern reversed: 70% saw days warming faster, as the industrial haze that had been dimming daytime sunshine was cleaned up. The study compares two fixed thirty-year windows; measured as a turning point, this site's own global series turns around 1982.

Zhong et al. 2023

1991-93Volcanic

Mount Pinatubo erupts

Pinatubo's cooling is only faintly visible in Canada's own record. 1992, the year after the June 1991 eruption, ranks 18th-coldest of the 76 years there. A single large eruption can hold temperatures down for two or three years; it cannot reverse the trend.

Learn more →

1995Ocean Oscillation

Atlantic Multidecadal Oscillation flips to a warm phase

The Atlantic Multidecadal Oscillation - a slow natural cycle in North Atlantic sea temperatures, roughly 60-70 years long - flips to its warm phase in 1995. Warm phases are linked to more active Atlantic hurricane seasons, wetter summers in parts of north-west Europe and more frequent drought in the central and western United States.

Learn more →

1997-98ENSO

1997-98 El Niño

Canada's temperatures for January-March 1998 ran +1.8°C against the 1961-90 average - the warm January-March that El Niño usually brings here. It is often treated as the textbook strong El Niño.

ONI +2.4°C · RONI +2.3°C

NOAA CPC, NOAA NCEIENSO Tracker

1998cold

The Great Ice Storm, 1998

For five days in January 1998 freezing rain coated eastern Ontario and southern Quebec in ice, bringing down power lines and pylons. About 1.4 million customers in Quebec and 230,000 in Ontario lost power, some for weeks; as many as 35 people died and the army deployed 16,000 troops. The year as a whole was mild: 1998 is Canada's 5th-warmest in this site's 1950-2025 record, helped by the very strong 1997-98 El Niño.

The Canadian Encyclopedia, Veterans Affairs Canada

1999-2001ENSO

The 1999-2001 La Niña

Canada's temperatures for January-March 2000 ran +2.5°C against the 1961-90 average - the opposite of the cool January-March La Niña usually brings here.

ONI -1.5°C · RONI -1.6°C

NOAA CPC ONI

1999Ocean Oscillation

Pacific Decadal Oscillation flips back to a cool phase

The Pacific Decadal Oscillation - a slow natural cycle in North Pacific sea temperatures - flips back to its cool phase around 1998-99. The cool phase that followed is one reason global surface warming appeared to slow in the 2000s, as more heat went into the deep Pacific.

Learn more →

2009-10ENSO

2009-10 El Niño

Canada's temperatures for January-March 2010 ran +5.2°C against the 1961-90 average - the warm January-March that El Niño usually brings here.

ONI +1.5°C · RONI +1.5°C

NOAA/IRI ENSO archiveENSO Tracker

2010Pattern Shift

Global heatwave days sharply accelerate

Canada's own heatwave days - days in warm spells well above the local norm - rose from a 1961-90 average of 6.0 a year to 14.0 in 2016-25 - more than double. Worldwide, heatwave days have roughly doubled each decade since 2010, as the whole temperature distribution has shifted upwards.

Learn more →Heatwave Days

2010-12ENSO

The 2010-2012 La Niña

Canada's temperatures for January-March 2011 ran +0.9°C against the 1961-90 average - the opposite of the cool January-March La Niña usually brings here.

ONI -1.6°C · RONI -1.6°C

NOAA CPC ONI

2010Other

2010: Canada's warmest year

2010 was Canada's warmest year since national records began in 1948 - 3.0°C above normal - after its mildest winter on record. The Vancouver Winter Olympics, in February, had rain instead of snow and temperatures above 5°C for weeks. It is also Canada's warmest year in this site's 1950-2025 record.

CBC News, CBC News (2)

2013GHG Milestone

CO₂ crosses 400 ppm

Atmospheric CO₂ passes 400 ppm at Mauna Loa on 9 May 2013 - a level the planet had not seen for 3-5 million years, since the Pliocene, when sea levels were many metres higher.

NOAA GMLGreenhouse Gases

2013Flood

The southern Alberta floods, 2013

In June 2013 heavy rain on the Rocky Mountain foothills, falling onto late snow, sent the Bow and Elbow rivers through Calgary and neighbouring towns. About 100,000 people were evacuated, and at around C$5 billion it was, until the Fort McMurray fire, the costliest disaster in Canadian history.

City of Calgary, The Weather Network

2015-16ENSO

2015-16 El Niño

Canada's temperatures for January-March 2016 ran +3.4°C against the 1961-90 average - the warm January-March that El Niño usually brings here. By the raw ONI index it was the strongest El Niño ever measured - a reminder that a strong index does not guarantee a strong local outcome.

ONI +2.6°C · RONI +2.3°C

NOAA CPCENSO Tracker

2015-25Pattern Shift

2015-2025: the eleven warmest years on record

Globally, the eleven warmest years on record have all happened since 2015. Canada's own record is a looser fit - five of its eleven warmest fall in that span, with 2012, 2010, 2006, 2001, 1998 and 1981 outside it. Its warmest year is 2010.

Learn more →

2016wildfire

The Fort McMurray wildfire, 2016

On 3 May 2016 a wildfire swept into Fort McMurray, Alberta, forcing about 88,000 people to leave - the largest wildfire evacuation in the province's history. At around C$9 billion it remains the costliest disaster in Canadian history.

PreventionWeb, Climate Central

2020GHG Milestone

COVID-19 lockdowns - CO₂ emissions dip

Global fossil CO₂ emissions fell about 5.8% in 2020, from 37.0 to 34.8 billion tonnes, yet atmospheric CO₂ still rose 2.5 ppm - the dip barely registers in the atmospheric record. Emissions were back to pre-pandemic levels by 2022.

Le Quéré et al. 2020

2020Industrial Aerosol

Low-sulphur shipping fuel rule (IMO 2020)

New international shipping rules cut the sulphur allowed in ship fuel from 3.5% to 0.5% almost overnight, removing about 8 million tonnes of sulphur dioxide a year. With less sulphate haze over the oceans, it may have added around 0.1°C of warming by 2023-24.

Gettelman et al. 2024

2020-23ENSO

The 2020-2023 'triple-dip' La Niña

Canada's temperatures for January-March 2021 ran +2.7°C against the 1961-90 average - the opposite of the cool January-March La Niña usually brings here.

ONI -1.1°C · RONI -1.5°C

This site's own /climate/enso page

2021Heatwave

Canada's 49.6°C: Lytton, June 2021

On 29 June 2021 the village of Lytton, British Columbia, reached 49.6°C - the highest temperature ever measured in Canada, and 4.6°C above the previous national record, set in 1937. It was the third day running that Lytton broke the record. The next day a wildfire destroyed most of the village.

CBC News, Royal Meteorological Society

2023-24ENSO

2023-24 El Niño

Canada's temperatures for January-March 2024 ran +3.2°C against the 1961-90 average - the warm January-March that El Niño usually brings here. Globally it helped produce the record temperatures of 2023 and 2024.

ONI +2.0°C · RONI +1.4°C

NOAA CPCENSO Tracker

2023wildfire

Canada's record wildfire season, 2023

Canada's 2023 fires burned about 18.4 million hectares - two and a half times the previous record, set in 1995, and more than six times the average of the past decade. Smoke reached as far as New York and western Europe.

Natural Resources Canada, NASA Earth Observatory

Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).

Heatwave Days – Canada

Warm Spell Duration Index (WSDI) - days in a 6+ day run above the local 90th-percentile temperature for that time of year.

Heatwave days per year2023 (Record)10-yr avg

Data: World Bank Climate Change Knowledge Portal (ERA5-derived). Refreshed roughly 1-2x/year, ~7-8 months behind present.

Climate Map – Global

Source: NOAA Climate at a Glance (countries & continents) · Met Office (UK) · US states & climate regions. Anomalies are vs the 1961–1990 baseline. See methodology.

Typical Climate – Canada

Köppen Dfc · Continental

Canada has a continental climate (Köppen Dfc: Subarctic), with distinct warm summers and cool-to-cold winters. July is typically the warmest month, averaging 14.3°C, while February is the coldest at -19.9°C. Annual precipitation averages around 508mm, spread fairly evenly across the year.

Warmest month
Jul 14°C
Coldest month
Feb -20°C
Annual rainfall
349mm
Wettest month
Jul 62mm
Annual snowfall
159mmwater-equiv.
Snowiest month
Dec 27mm
RainSnow (water-equivalent)

Monthly climate normals (2016–2025) - bar colour and height show average temperature, the shaded area shows average monthly rain, with snow (water-equivalent) shown separately.

Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).

Year-on-Year Trends

The 4byo Climate Helix – Canada

1940→20261961–1990 baselineColdest (1972)2016–2025 meanWarmest (2010)2026 so far
2026Aug
WinterSpringSummerAutumnJanFebMarAprMayJunJulAugSepOctNovDec1940-692016-25Spr Start−3 days1940-692016-25Aut End+6 days-25°-20°-15°-10°-5°0°5°10°15°
Temp
-2.7°C
+2.1 vs base
Precipitation
214mm
-318 vs base
Frost
—days
ENSO
—
RONI 3-mo mean
Playback
8×
Mode
Presets

Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).

Monthly Temperature – Canada

All years since 19722010 (Warmest)1972 (Coldest)2026 (Current Year)

Background lines show the last 40 years (plus the record year and its opposite, wherever they fall).

Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).

Records – Canada

Latest data Aug 2026
Warmest year
2010
-1.7°C
Coldest year
1972
-6.8°C
2026 so far
#21/87
-2.7°C

Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP) - Anomalies vs 1901-2000 mean

Shifting Seasons

Warm / cold seasonsKöppen Dfc · Continental

How spring and autumn have shifted in Canada. Spring is defined as the date monthly temperatures first rise above the long-term annual mean (-4.8°C, from 1940–1969); autumn is the date they fall back below it. Temperature swings 35.9°C peak-to-peak across the year - a classic four-seasons rhythm.

Shifting summer
9 days Longer
Warm Season
1940–1969 Baseline: 22 Apr → 25 Oct · 186 days
2016–2025 Now: 19 Apr → 1 Nov · 195 days
J
F
M
A
M
J
J
A
S
O
N
D
Spr 3 days EarlierAut 6 days Later
baseline yr·recent yr·ring = global temp anomaly

Baseline vs recent monthly temperature climatology. Biggest warming: Jan (+4.2°C).

Data: Our World in Data / NOAA (precipitation: GPCC (DWD); frost: World Bank CCKP).

Climate Systems

Loading ENSO tracker…

Emissions & Energy

Explore

Explore Climate Data

Data Sources

Data Sources for Canada

Every figure on this page is sourced from official, openly published climate datasets. Anomalies are calculated against the 1961–1990 baseline (temperature) and 1991–2020 (rainfall, sunshine, frost) - see the Methodology & Sources page for the complete dataset list and update calendar.

FAQs

FAQs

How is the climate in Canada changing?

Canada is warming in line with the rest of the world. The page above shows the latest monthly temperature anomaly versus the 1961-1990 baseline, the long-term annual trend, and the region's rank in the historical record. The headline panel also shows the long-term trend rate per decade and the warmest and coolest years on file.

What is the climate like in Canada?

Canada has a continental climate (Köppen Dfc: Subarctic), with distinct warm summers and cool-to-cold winters. July is typically the warmest month, averaging 14.3°C, while February is the coldest at -19.9°C. Annual precipitation averages around 508mm, spread fairly evenly across the year.

Where does the climate data for Canada come from?

Climate data for Canada comes from Our World in Data, sourcing Copernicus ERA5 and HadCRUT5 (national temperature anomaly) and the Global Carbon Project via Our World in Data (CO₂ emissions), refreshed every month, when the upstream temperature and rainfall data are refreshed.

What is the climate baseline used on this page?

Anomalies on this page are calculated against the 1961-1990 climatological baseline, which is the standard reference period used by the Met Office, NOAA, IPCC and most national climate services. Some panels also show the source-native 1901-2000 (NOAA) or 1991-2020 (WMO) baselines for verification. See Methodology & Sources for the full reference.

Which areas does the Canada climate data cover?

The Canada climate profile covers Toronto, Montreal, Vancouver, Calgary and surrounding areas. Temperature, rainfall and emissions data for Canada

How often is the Canada climate update refreshed?

The Canada climate update is refreshed monthly, typically a few days after the previous month closes and the upstream provider (Met Office HadUK-Grid, NOAA Climate at a Glance, Copernicus ERA5 or the Global Carbon Project) publishes its update. See the Climate Rankings for cross-region comparisons.

What counts as a Heatwave Day on the Canada climate page?

Heatwave Days use the Warm Spell Duration Index (WSDI) - the WMO/ETCCDI-standard heatwave measure: days that are part of a run of 6 or more consecutive days above the local 90th-percentile temperature for that calendar day. The 90th-percentile threshold varies by time of year (a hot day in January is judged differently to one in July) but is fixed to the 1961-1990 baseline for every year shown - it does not shift as the climate warms, which is why Heatwave Days trend upward over time.

Does the Canada climate page include frost and snow data?

Yes. Frost Days (days with a minimum temperature below 0°C, World Bank CCKP) and snow water-equivalent (GPCC) are shown alongside temperature and precipitation, each measured against the 1961-1990 baseline where a like-for-like historical comparison is available.

What major climate events has Canada experienced?

Major climate events in Canada include 1972: Canada's coldest year; The Great Ice Storm, 1998; 2010: Canada's warmest year; The southern Alberta floods, 2013; The Fort McMurray wildfire, 2016; Canada's 49.6°C: Lytton, June 2021; Canada's record wildfire season, 2023. The Climate History panel on this page lists 40 sourced events and pattern shifts relevant to Canada, the earliest from 1912 - 7 about Canada itself and the rest global context such as volcanic eruptions and El Niño events. Each entry carries its own sources and can be searched, filtered to local events or by category, and sorted by date; scrolling the list moves a cursor across the chart above so you can see where each event falls in the record.

Where does the Climate History list for Canada come from, and how is it checked?

It is a hand-reviewed register, not an automatic feed. Every entry is sourced, and each one records how it was verified - against this site's own data series, against a peer-reviewed paper, or against the public record of the event. 17 of the 40 entries here are written specifically about Canada, usually quoting its own ranking or measured figures. The rest give global or national context shared with wider pages. Where a figure is narrower than it first appears, or a famous claim does not hold locally, the entry says so.