Calgary, Alberta, Canada Climate Change Severity

62
Very High
The current climate change severity in Calgary is Very High, with a 31.1% worsening in the climate score compared to last 15 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Oct. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Calgary Weather Condition Changes (Historic Vs 2025)

2025
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2025

Over the past 15 year(s), Calgary temperature has changed by around +15.9%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Oct. (Historical Vs 2025)

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
5853
-8.6%
cloudyCloudy
7854
-30.7%
rainyRainy
11669
-40.5%
snowySnowy
84
-50%
mistyMisty
04
100%

Disclaimer: Other weather conditions not shown may affect the total day count.

Climate Change Indicators:

Over the past 15 years, Calgary has experienced measurable shifts in key climate parameters, contributing to the current severity score of 62 (within the Very High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

62/100

Very High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Calgary experienced significant changes:

Temperature change of

+0.9 °C

Variation in annual rainfall

+100.5 %

Change in average humidity

-6.1 %

PM2.5 levels surged by

-26.9 %

Heatwave changed by

+1.8 day(s)

Coldwave changed by

-6.3 day(s)

Wind speeds changed by

+1.9 km/h

These indicators show a dramatic increase in volatility and worsening conditions. Calgary's Very High severity status requires urgent and immediate adaptation and mitigation strategies, particularly focused on managing extreme weather events, improving air quality, and ensuring water resources are adequate for the population.

Check how we calculate Climate Change Severity
Based on data from Jan. to Oct.

Calgary Weather Forecast 30 Days (November - December 2025)
Calgary, Alberta, Canada

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Wed. 26, Nov.
sunnySunny
Temperature Icon5°/-8°
Humidity Icon61%
Wind Icon8km/h
Thu. 27, Nov.
moderate snowModerate snow
Temperature Icon-2°/-7°
Humidity Icon91%
Wind Icon14km/h
Fri. 28, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon-6°/-12°
Humidity Icon79%
Wind Icon9km/h
Sat. 29, Nov.
mistMist
Temperature Icon-6°/-13°
Humidity Icon89%
Wind Icon9km/h
Sun. 30, Nov.
mistMist
Temperature Icon-10°/-14°
Humidity Icon92%
Wind Icon17km/h
Mon. 1, Dec.
light freezing rainLight freezing rain
Temperature Icon-2°/-12°
Humidity Icon83%
Wind Icon13km/h
Tue. 2, Dec.
light freezing rainLight freezing rain
Temperature Icon0°/-6°
Humidity Icon83%
Wind Icon13km/h
Wed. 3, Dec.
mistMist
Temperature Icon-1°/-9°
Humidity Icon92%
Wind Icon7km/h
Thu. 4, Dec.
light freezing rainLight freezing rain
Temperature Icon0°/-8°
Humidity Icon82%
Wind Icon21km/h
Fri. 5, Dec.
partly cloudyPartly Cloudy
Temperature Icon-1°/-9°
Humidity Icon84%
Wind Icon12km/h
Sat. 6, Dec.
freezing fogFreezing fog
Temperature Icon-10°/-13°
Humidity Icon94%
Wind Icon12km/h
Sun. 7, Dec.
sunnySunny
Temperature Icon0°/-16°
Humidity Icon69%
Wind Icon36km/h
Mon. 8, Dec.
sunnySunny
Temperature Icon-2°/-18°
Humidity Icon71%
Wind Icon20km/h
Tue. 9, Dec.
light freezing rainLight freezing rain
Temperature Icon-13°/-19°
Humidity Icon81%
Wind Icon29km/h
Wed. 10, Dec.
light freezing rainLight freezing rain
Temperature Icon-3°/-10°
Humidity Icon79%
Wind Icon17km/h
Thu. 11, Dec.
light freezing rainLight freezing rain
Temperature Icon-3°/-10°
Humidity Icon84%
Wind Icon16km/h
Fri. 12, Dec.
light freezing rainLight freezing rain
Temperature Icon-4°/-11°
Humidity Icon83%
Wind Icon15km/h
Sat. 13, Dec.
patchy moderate snowPatchy moderate snow
Temperature Icon-5°/-12°
Humidity Icon82%
Wind Icon16km/h
Sun. 14, Dec.
light freezing rainLight freezing rain
Temperature Icon-3°/-12°
Humidity Icon81%
Wind Icon17km/h
Mon. 15, Dec.
light freezing rainLight freezing rain
Temperature Icon-4°/-12°
Humidity Icon82%
Wind Icon16km/h
Tue. 16, Dec.
light freezing rainLight freezing rain
Temperature Icon-4°/-12°
Humidity Icon82%
Wind Icon17km/h
Wed. 17, Dec.
light freezing rainLight freezing rain
Temperature Icon-4°/-12°
Humidity Icon81%
Wind Icon17km/h
Thu. 18, Dec.
moderate snowModerate snow
Temperature Icon-4°/-12°
Humidity Icon84%
Wind Icon19km/h
Fri. 19, Dec.
light freezing rainLight freezing rain
Temperature Icon-5°/-12°
Humidity Icon80%
Wind Icon17km/h
Sat. 20, Dec.
patchy moderate snowPatchy moderate snow
Temperature Icon-5°/-12°
Humidity Icon83%
Wind Icon18km/h
Sun. 21, Dec.
patchy moderate snowPatchy moderate snow
Temperature Icon-4°/-12°
Humidity Icon83%
Wind Icon17km/h
Mon. 22, Dec.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon-6°/-13°
Humidity Icon83%
Wind Icon16km/h
Tue. 23, Dec.
patchy moderate snowPatchy moderate snow
Temperature Icon-6°/-15°
Humidity Icon83%
Wind Icon18km/h
Wed. 24, Dec.
patchy moderate snowPatchy moderate snow
Temperature Icon-6°/-14°
Humidity Icon86%
Wind Icon16km/h
Thu. 25, Dec.
light freezing rainLight freezing rain
Temperature Icon-7°/-14°
Humidity Icon86%
Wind Icon16km/h
Fri. 26, Dec.
light freezing rainLight freezing rain
Temperature Icon-6°/-14°
Humidity Icon85%
Wind Icon17km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onWed. 26, Nov.

5.3°C

Low will be onTue. 9, Dec.

-19.2°C

HumidityHumidity

High will be onSat. 6, Dec.

94%

Low will be onWed. 26, Nov.

61%

Wind SpeedWind Speed

High will be onSun. 7, Dec.

36.4km/h

Low will be onWed. 3, Dec.

7.2km/h

PrecipitationPrecipitation

High will be onMon. 22, Dec.

2.2mm

Low will be onSun. 7, Dec.

0.01mm

Ultraviolet IndexUV

High will be onFri. 5, Dec.

2

Low will be onSun. 30, Nov.

1

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