Calgary, Alberta, Canada Climate Change Severity

62
Very High
The current climate change severity in Calgary is Very High, with a 30.6% 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 Sep. (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 +16.2%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
5047
-6%
cloudyCloudy
6843
-36.7%
rainyRainy
10969
-36.6%
snowySnowy
74
-42.8%
mistyMisty
03
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

+1.002 °C

Variation in annual rainfall

+112.09 %

Change in average humidity

-5.8 %

PM2.5 levels surged by

-28.3 %

Heatwave changed by

+2.7 day(s)

Coldwave changed by

-4.2 day(s)

Wind speeds changed by

+1.8 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 Sep.

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

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Mon. 6, Oct.
sunnySunny
Temperature Icon17°/2°
Humidity Icon50%
Wind Icon11km/h
Tue. 7, Oct.
sunnySunny
Temperature Icon21°/4°
Humidity Icon55%
Wind Icon13km/h
Wed. 8, Oct.
overcastOvercast
Temperature Icon9°/6°
Humidity Icon63%
Wind Icon22km/h
Thu. 9, Oct.
sunnySunny
Temperature Icon17°/4°
Humidity Icon67%
Wind Icon15km/h
Fri. 10, Oct.
sunnySunny
Temperature Icon23°/8°
Humidity Icon47%
Wind Icon15km/h
Sat. 11, Oct.
sunnySunny
Temperature Icon20°/7°
Humidity Icon39%
Wind Icon26km/h
Sun. 12, Oct.
light snowLight snow
Temperature Icon1°/-4°
Humidity Icon82%
Wind Icon30km/h
Mon. 13, Oct.
light freezing rainLight freezing rain
Temperature Icon5°/-4°
Humidity Icon77%
Wind Icon23km/h
Tue. 14, Oct.
sunnySunny
Temperature Icon8°/-3°
Humidity Icon63%
Wind Icon11km/h
Wed. 15, Oct.
sunnySunny
Temperature Icon10°/1°
Humidity Icon59%
Wind Icon18km/h
Thu. 16, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon9°/1°
Humidity Icon60%
Wind Icon22km/h
Fri. 17, Oct.
sunnySunny
Temperature Icon9°/-1°
Humidity Icon59%
Wind Icon9km/h
Sat. 18, Oct.
sunnySunny
Temperature Icon10°/0°
Humidity Icon57%
Wind Icon19km/h
Sun. 19, Oct.
patchy rain possiblePatchy rain possible
Temperature Icon14°/2°
Humidity Icon62%
Wind Icon16km/h
Mon. 20, Oct.
patchy rain possiblePatchy rain possible
Temperature Icon11°/2°
Humidity Icon67%
Wind Icon18km/h
Tue. 21, Oct.
moderate rain at timesModerate rain at times
Temperature Icon11°/0°
Humidity Icon66%
Wind Icon16km/h
Wed. 22, Oct.
moderate rain at timesModerate rain at times
Temperature Icon9°/0°
Humidity Icon67%
Wind Icon17km/h
Thu. 23, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon7°/-1°
Humidity Icon70%
Wind Icon17km/h
Fri. 24, Oct.
moderate rain at timesModerate rain at times
Temperature Icon7°/-3°
Humidity Icon67%
Wind Icon16km/h
Sat. 25, Oct.
light freezing rainLight freezing rain
Temperature Icon7°/-4°
Humidity Icon67%
Wind Icon19km/h
Sun. 26, Oct.
patchy rain possiblePatchy rain possible
Temperature Icon7°/-3°
Humidity Icon67%
Wind Icon19km/h
Mon. 27, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon7°/-2°
Humidity Icon68%
Wind Icon22km/h
Tue. 28, Oct.
patchy moderate snowPatchy moderate snow
Temperature Icon5°/-3°
Humidity Icon70%
Wind Icon17km/h
Wed. 29, Oct.
patchy moderate snowPatchy moderate snow
Temperature Icon6°/-4°
Humidity Icon74%
Wind Icon17km/h
Thu. 30, Oct.
patchy rain possiblePatchy rain possible
Temperature Icon8°/-3°
Humidity Icon72%
Wind Icon17km/h
Fri. 31, Oct.
moderate rain at timesModerate rain at times
Temperature Icon7°/-2°
Humidity Icon72%
Wind Icon16km/h
Sat. 1, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon5°/-3°
Humidity Icon76%
Wind Icon19km/h
Sun. 2, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon5°/-3°
Humidity Icon76%
Wind Icon18km/h
Mon. 3, Nov.
patchy moderate snowPatchy moderate snow
Temperature Icon5°/-3°
Humidity Icon73%
Wind Icon17km/h
Tue. 4, Nov.
light freezing rainLight freezing rain
Temperature Icon6°/-4°
Humidity Icon74%
Wind Icon17km/h
Wed. 5, Nov.
moderate snowModerate snow
Temperature Icon5°/-4°
Humidity Icon75%
Wind Icon20km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onFri. 10, Oct.

22.9°C

Low will be onWed. 5, Nov.

-4.5°C

HumidityHumidity

High will be onSun. 12, Oct.

82%

Low will be onSat. 11, Oct.

39%

Wind SpeedWind Speed

High will be onSun. 12, Oct.

29.5km/h

Low will be onFri. 17, Oct.

9km/h

PrecipitationPrecipitation

High will be onThu. 23, Oct.

3.2mm

Low will be onSat. 11, Oct.

0.02mm

Ultraviolet IndexUV

High will be onSat. 11, Oct.

4

Low will be onSun. 12, Oct.

1

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