Calgary, Alberta, Canada Climate Change Severity

52
High
The current climate change severity in Calgary is High, with a 5.8% 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 Jul. (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 +13.1%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
3123
-25.8%
cloudyCloudy
5438
-29.6%
rainyRainy
8667
-22.09%
snowySnowy
74
-42.8%
mistyMisty
01
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 52 (within the High severity category). This suggests worsening climate conditions from the previous years. Here’s a breakdown of the specific changes observed:

Severity Score

52/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Calgary experienced significant changes:

Temperature change of

+0.5 °C

Variation in annual rainfall

+140.6 %

Change in average humidity

-7.6 %

PM2.5 levels surged by

-32.1 %

Heatwave changed by

+5 day(s)

Coldwave changed by

-3.4 day(s)

Wind speeds changed by

+1.4 km/h

These indicators show that Calgary is experiencing a more volatile and extreme climate, reinforcing the need for urgent intervention to mitigate risks. As the severity score rises, focus must shift to adaptation and emergency preparedness.

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

Calgary Weather Forecast 30 Days (August - September 2025)
Calgary, Alberta, Canada

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Wed. 20, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon23°/13°
Humidity Icon63%
Wind Icon35km/h
Thu. 21, Aug.
sunnySunny
Temperature Icon21°/7°
Humidity Icon58%
Wind Icon28km/h
Fri. 22, Aug.
sunnySunny
Temperature Icon22°/8°
Humidity Icon60%
Wind Icon10km/h
Sat. 23, Aug.
sunnySunny
Temperature Icon22°/7°
Humidity Icon59%
Wind Icon15km/h
Sun. 24, Aug.
sunnySunny
Temperature Icon23°/8°
Humidity Icon62%
Wind Icon27km/h
Mon. 25, Aug.
sunnySunny
Temperature Icon25°/10°
Humidity Icon57%
Wind Icon9km/h
Tue. 26, Aug.
sunnySunny
Temperature Icon25°/11°
Humidity Icon61%
Wind Icon16km/h
Wed. 27, Aug.
sunnySunny
Temperature Icon25°/12°
Humidity Icon59%
Wind Icon11km/h
Thu. 28, Aug.
sunnySunny
Temperature Icon28°/12°
Humidity Icon51%
Wind Icon8km/h
Fri. 29, Aug.
partly cloudyPartly Cloudy
Temperature Icon23°/12°
Humidity Icon65%
Wind Icon12km/h
Sat. 30, Aug.
patchy rain possiblePatchy rain nearby
Temperature Icon24°/13°
Humidity Icon64%
Wind Icon12km/h
Sun. 31, Aug.
sunnySunny
Temperature Icon23°/12°
Humidity Icon59%
Wind Icon25km/h
Mon. 1, Sep.
sunnySunny
Temperature Icon24°/12°
Humidity Icon54%
Wind Icon23km/h
Tue. 2, Sep.
sunnySunny
Temperature Icon29°/12°
Humidity Icon54%
Wind Icon13km/h
Wed. 3, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon22°/8°
Humidity Icon57%
Wind Icon19km/h
Thu. 4, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/9°
Humidity Icon56%
Wind Icon15km/h
Fri. 5, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon21°/8°
Humidity Icon55%
Wind Icon17km/h
Sat. 6, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/8°
Humidity Icon59%
Wind Icon17km/h
Sun. 7, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon22°/8°
Humidity Icon56%
Wind Icon16km/h
Mon. 8, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/8°
Humidity Icon61%
Wind Icon17km/h
Tue. 9, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon20°/8°
Humidity Icon63%
Wind Icon15km/h
Wed. 10, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon19°/7°
Humidity Icon61%
Wind Icon17km/h
Thu. 11, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon20°/6°
Humidity Icon58%
Wind Icon18km/h
Sat. 13, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon17°/7°
Humidity Icon64%
Wind Icon16km/h
Sun. 14, Sep.
heavy rain at timesHeavy rain at times
Temperature Icon18°/6°
Humidity Icon62%
Wind Icon15km/h
Mon. 15, Sep.
moderate rain at timesModerate rain at times
Temperature Icon19°/7°
Humidity Icon61%
Wind Icon16km/h
Tue. 16, Sep.
moderate rain at timesModerate rain at times
Temperature Icon19°/7°
Humidity Icon57%
Wind Icon14km/h
Wed. 17, Sep.
patchy rain possiblePatchy rain possible
Temperature Icon19°/6°
Humidity Icon55%
Wind Icon16km/h
Thu. 18, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon18°/6°
Humidity Icon58%
Wind Icon17km/h
Fri. 19, Sep.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon17°/6°
Humidity Icon62%
Wind Icon16km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onTue. 2, Sep.

28.8°C

Low will be onFri. 19, Sep.

5.9°C

HumidityHumidity

High will be onFri. 29, Aug.

65%

Low will be onThu. 28, Aug.

51%

Wind SpeedWind Speed

High will be onWed. 20, Aug.

35.3km/h

Low will be onThu. 28, Aug.

8.3km/h

PrecipitationPrecipitation

High will be onWed. 20, Aug.

4.1mm

Low will be onTue. 26, Aug.

0.01mm

Ultraviolet IndexUV

High will be onMon. 25, Aug.

5

Low will be onWed. 3, Sep.

3

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