Climate Trends and Variations Bulletin - Autumn 2022
Autumn 2022 bulletin (PDF, 2.1 MB)
This bulletin summarizes recent climate data and presents it in a historical context. It first examines the national average temperature for the season and then highlights interesting regional temperature information.
Over the past decade, precipitation monitoring technology has evolved and Environment and Climate Change Canada (ECCC) and its partners implemented a transition from manual observations to using automatic precipitation gauges. Extensive data integration is required to link the current precipitation observations to the long-term historical manual observations. The update and reporting of historical adjusted precipitation trends and variations will be on temporary hiatus pending the extensive data reconciliation, and will resume thereafter. ECCC remains committed to providing credible climate data to inform adaptation decision making, while ensuring the necessary data reconciliation occurs as monitoring technology evolves.
Temperature departures and rankings data table (CSV, 9 kB)
Temperature trends and extremes data table (CSV, 2 kB)
National temperature
The national average temperature for the autumn (September–November) of 2022 was 2.1°C above the baseline average (defined as the mean over the 1961–1990 reference period), based on preliminary data, which had been the 6th warmest observed since nationwide recording began in 1948. The warmest autumn occurred in 2021, when the national average temperature was 3.2°C above the baseline average. The coolest autumn occurred in 1986, when the national average temperature was 1.8°C below the baseline average. The temperature departures map (below) shows that most of Canada experienced temperatures at least 1.0°C above the baseline average where central Quebec, northern Alberta and Saskatchewan experienced temperatures above 2.5°C. The Northwest Territories, northern Yukon, and some areas of Nunavut experienced temperatures above the baseline average by a more moderate 3.0°C to 4.5°C. Only central British Columbia experienced temperatures close to the baseline average.
Temperature departures from the 1961 to 1990 average - Autumn 2022
Long description
The temperature departures map shows that most of Canada experienced temperatures at least 1.0°C above the baseline average where central Quebec, northern Alberta and Saskatchewan experienced temperatures above 2.5°C. The Northwest Territories, northern Yukon, and some areas of Nunavut experienced temperatures above the baseline average by a more moderate 3.0°C to 4.5°C. Only central British Columbia experienced temperatures close to the baseline average.
The time series graph (below) shows that autumn temperatures averaged across the country have fluctuated from year to year over the 1948–2022 period. With the exception of 2018, averaged autumn temperatures have remained above the baseline average since 1996. The linear trend indicates that autumn temperatures, averaged across the nation, have warmed by 1.8°C over the past 75 years.
Autumn national temperature departures and long-term trend, 1948–2022
Long description
The time series graph shows that autumn temperatures averaged across the country have fluctuated from year to year over the 1948–2022 period. With the exception of 2018, averaged autumn temperatures have remained above the baseline average since 1996. The linear trend indicates that autumn temperatures, averaged across the nation, have warmed by 1.8°C over the past 75 years.
Regional temperature
When examining on a regional basis, the average autumn temperatures in 2022 were among the 10 warmest on record since 1948 for four of the eleven climate regions. These regions were: Mackenzie District (3rd warmest at 3.2°C above average); Atlantic Canada (4th warmest at 2°C above average); Northeastern Forest (6th warmest at 2°C above average) and Northwestern Forest (9th warmest at 2.1°C above average). The average autumn temperatures in 2022 have not been among the 10 coolest on record since 1948 for any of the eleven climate regions. All eleven climate regions exhibit positive trends for autumn temperatures over the 75 years of record. The strongest trends were observed in both the Arctic Tundra and the Arctic Mountains & Fiords regions (+2.8°C), while the weakest trends (+0.7°C) were found in both the Prairies and the South B.C. Mountains regions. Tables listing the Autumn regional and national temperature departures and rankings from 1948 to 2022 (CSV, 9kB) and summarizing the Autumn regional and national trends and extremes (CSV, 2kB) are available through the above links or upon request at btvc-ctvb@ec.gc.ca.
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The map of Canadian Climate Regions
Long description
A map that shows the Canadian Climate Regions: Atlantic Canada, Great Lakes/St. Lawrence Lowlands, Northeastern Forest, Northwestern Forest, Prairies, South British Columbia Mountains, Pacific Coast, North British Columbia Mountains/Yukon, Mackenzie District, Arctic Tundra, Arctic Mountains and Fiords.
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