Lethbridge, Alberta, Canada Climate Change Severity

57
High
The current climate change severity in Lethbridge is High, with a 7.2% 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)

Lethbridge 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), Lethbridge temperature has changed by around +4.2%, 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
7246
-36.1%
cloudyCloudy
7044
-37.1%
rainyRainy
9053
-41.1%
snowySnowy
710
42.8%
mistyMisty
022
100%

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

Climate Change Indicators:

Over the past 15 years, Lethbridge has experienced measurable shifts in key climate parameters, contributing to the current severity score of 57 (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

57/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Lethbridge experienced significant changes:

Temperature change of

+0.3 °C

Variation in annual rainfall

+42.7 %

Change in average humidity

+2.7 %

PM2.5 levels surged by

-29.8 %

Heatwave changed by

-7.4 day(s)

Coldwave changed by

-11.7 day(s)

Wind speeds changed by

+2.6 km/h

These indicators show that Lethbridge 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 Sep.

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

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Sat. 11, Oct.
sunnySunny
Temperature Icon19°/6°
Humidity Icon58%
Wind Icon37km/h
Sun. 12, Oct.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon2°/-2°
Humidity Icon85%
Wind Icon31km/h
Mon. 13, Oct.
overcastOvercast
Temperature Icon1°/-5°
Humidity Icon65%
Wind Icon13km/h
Tue. 14, Oct.
light freezing rainLight freezing rain
Temperature Icon6°/-4°
Humidity Icon71%
Wind Icon10km/h
Wed. 15, Oct.
sunnySunny
Temperature Icon12°/0°
Humidity Icon69%
Wind Icon12km/h
Thu. 16, Oct.
sunnySunny
Temperature Icon11°/2°
Humidity Icon61%
Wind Icon26km/h
Fri. 17, Oct.
partly cloudyPartly Cloudy
Temperature Icon13°/5°
Humidity Icon55%
Wind Icon31km/h
Sat. 18, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon8°/2°
Humidity Icon55%
Wind Icon32km/h
Sun. 19, Oct.
sunnySunny
Temperature Icon7°/-1°
Humidity Icon65%
Wind Icon17km/h
Mon. 20, Oct.
partly cloudyPartly Cloudy
Temperature Icon8°/2°
Humidity Icon55%
Wind Icon21km/h
Tue. 21, Oct.
moderate snowModerate snow
Temperature Icon3°/-1°
Humidity Icon71%
Wind Icon23km/h
Wed. 22, Oct.
sunnySunny
Temperature Icon7°/-4°
Humidity Icon68%
Wind Icon8km/h
Thu. 23, Oct.
sunnySunny
Temperature Icon12°/-1°
Humidity Icon56%
Wind Icon13km/h
Fri. 24, Oct.
sunnySunny
Temperature Icon14°/3°
Humidity Icon43%
Wind Icon17km/h
Sat. 25, Oct.
patchy rain possiblePatchy rain possible
Temperature Icon9°/-2°
Humidity Icon64%
Wind Icon23km/h
Sun. 26, Oct.
moderate rain at timesModerate rain at times
Temperature Icon8°/-1°
Humidity Icon63%
Wind Icon26km/h
Mon. 27, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/0°
Humidity Icon65%
Wind Icon24km/h
Tue. 28, Oct.
patchy rain possiblePatchy rain possible
Temperature Icon8°/-2°
Humidity Icon68%
Wind Icon22km/h
Wed. 29, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/-1°
Humidity Icon72%
Wind Icon22km/h
Thu. 30, Oct.
patchy rain possiblePatchy rain possible
Temperature Icon9°/-1°
Humidity Icon70%
Wind Icon25km/h
Fri. 31, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon9°/0°
Humidity Icon70%
Wind Icon23km/h
Sat. 1, Nov.
heavy rain at timesHeavy rain at times
Temperature Icon8°/-1°
Humidity Icon70%
Wind Icon21km/h
Sun. 2, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon7°/0°
Humidity Icon72%
Wind Icon23km/h
Mon. 3, Nov.
heavy rain at timesHeavy rain at times
Temperature Icon8°/-1°
Humidity Icon69%
Wind Icon22km/h
Tue. 4, Nov.
patchy rain possiblePatchy rain possible
Temperature Icon8°/-1°
Humidity Icon70%
Wind Icon24km/h
Wed. 5, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/-1°
Humidity Icon69%
Wind Icon24km/h
Thu. 6, Nov.
light freezing rainLight freezing rain
Temperature Icon6°/-4°
Humidity Icon69%
Wind Icon22km/h
Fri. 7, Nov.
heavy rain at timesHeavy rain at times
Temperature Icon5°/-2°
Humidity Icon71%
Wind Icon25km/h
Sat. 8, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon4°/-3°
Humidity Icon71%
Wind Icon23km/h
Sun. 9, Nov.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon4°/-6°
Humidity Icon75%
Wind Icon23km/h
Mon. 10, Nov.
moderate snowModerate snow
Temperature Icon2°/-6°
Humidity Icon76%
Wind Icon23km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSat. 11, Oct.

19.4°C

Low will be onSun. 9, Nov.

-6.2°C

HumidityHumidity

High will be onSun. 12, Oct.

85%

Low will be onFri. 24, Oct.

43%

Wind SpeedWind Speed

High will be onSat. 11, Oct.

37.4km/h

Low will be onWed. 22, Oct.

7.9km/h

PrecipitationPrecipitation

High will be onSun. 12, Oct.

13.08mm

Low will be onSun. 19, Oct.

0.01mm

Ultraviolet IndexUV

High will be onThu. 16, Oct.

3

Low will be onSat. 18, Oct.

1

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