Sarnia, Ontario, Canada Climate Change Severity

57
High
The current climate change severity in Sarnia is High, with a 8.3% worsening in the climate score compared to last 16 years. This suggests deteriorating conditions, with increasing negative impacts on weather patterns and environmental conditions.
Data: Jan. to Jan. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Sarnia Weather Condition Changes (Historic Vs 2026)

2026
0%
0%
0%
0%
0%
0%
0%
0%
0%
0%
Historic
2026

Over the past 16 year(s), Sarnia temperature has changed by around +63.8%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty
Data: Jan. to Jan. (Historical Vs 2026)

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
11
0%
cloudyCloudy
62
-66.6%
rainyRainy
113
-72.7%
snowySnowy
23
50%
mistyMisty
00
0%

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

Climate Change Indicators:

Over the past 16 years, Sarnia 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, Sarnia experienced significant changes:

Temperature change of

-2.5 °C

Variation in annual rainfall

-47.6 %

Change in average humidity

-3.6 %

PM2.5 levels surged by

+100 %

Heatwave changed by

-1.1 day(s)

Coldwave changed by

+1.8 day(s)

Wind speeds changed by

+2.2 km/h

These indicators show that Sarnia 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 Jan.

Sarnia Weather Forecast 30 Days (February - March 2026)
Sarnia, Ontario, Canada

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Sun. 15, Feb.
freezing fogFreezing fog
Temperature Icon1°/-3°
Humidity Icon97%
Wind Icon15km/h
Mon. 16, Feb.
overcastOvercast
Temperature Icon1°/-1°
Humidity Icon98%
Wind Icon20km/h
Tue. 17, Feb.
cloudyCloudy
Temperature Icon2°/0°
Humidity Icon94%
Wind Icon14km/h
Wed. 18, Feb.
heavy rainHeavy rain
Temperature Icon12°/0°
Humidity Icon92%
Wind Icon33km/h
Thu. 19, Feb.
light snowLight snow
Temperature Icon-1°/-3°
Humidity Icon88%
Wind Icon32km/h
Fri. 20, Feb.
blizzardBlizzard
Temperature Icon-4°/-9°
Humidity Icon93%
Wind Icon35km/h
Sat. 21, Feb.
partly cloudyPartly Cloudy
Temperature Icon-8°/-13°
Humidity Icon86%
Wind Icon24km/h
Sun. 22, Feb.
cloudyCloudy
Temperature Icon-4°/-11°
Humidity Icon87%
Wind Icon16km/h
Mon. 23, Feb.
light freezing rainLight freezing rain
Temperature Icon-2°/-12°
Humidity Icon87%
Wind Icon22km/h
Tue. 24, Feb.
mistMist
Temperature Icon-5°/-16°
Humidity Icon86%
Wind Icon18km/h
Wed. 25, Feb.
overcastOvercast
Temperature Icon0°/-10°
Humidity Icon85%
Wind Icon21km/h
Thu. 26, Feb.
light drizzleLight drizzle
Temperature Icon1°/0°
Humidity Icon98%
Wind Icon16km/h
Fri. 27, Feb.
fogFog
Temperature Icon1°/0°
Humidity Icon100%
Wind Icon8km/h
Sat. 28, Feb.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon3°/-9°
Humidity Icon98%
Wind Icon38km/h
Sun. 1, Mar.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon2°/-6°
Humidity Icon84%
Wind Icon26km/h
Mon. 2, Mar.
moderate snowModerate snow
Temperature Icon0°/-6°
Humidity Icon81%
Wind Icon27km/h
Tue. 3, Mar.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon0°/-6°
Humidity Icon80%
Wind Icon25km/h
Wed. 4, Mar.
patchy moderate snowPatchy moderate snow
Temperature Icon1°/-6°
Humidity Icon77%
Wind Icon21km/h
Thu. 5, Mar.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon2°/-6°
Humidity Icon78%
Wind Icon24km/h
Fri. 6, Mar.
patchy moderate snowPatchy moderate snow
Temperature Icon3°/-5°
Humidity Icon84%
Wind Icon29km/h
Sat. 7, Mar.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon3°/-3°
Humidity Icon84%
Wind Icon24km/h
Sun. 8, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon6°/-3°
Humidity Icon82%
Wind Icon25km/h
Mon. 9, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon6°/-2°
Humidity Icon83%
Wind Icon27km/h
Tue. 10, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon6°/-1°
Humidity Icon82%
Wind Icon28km/h
Wed. 11, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon6°/-1°
Humidity Icon80%
Wind Icon26km/h
Thu. 12, Mar.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon5°/-3°
Humidity Icon76%
Wind Icon23km/h
Fri. 13, Mar.
moderate or heavy snow showersModerate or heavy snow showers
Temperature Icon4°/-2°
Humidity Icon78%
Wind Icon25km/h
Sat. 14, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon6°/-1°
Humidity Icon81%
Wind Icon26km/h
Sun. 15, Mar.
moderate rain at timesModerate rain at times
Temperature Icon6°/-1°
Humidity Icon80%
Wind Icon24km/h
Mon. 16, Mar.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon7°/-2°
Humidity Icon79%
Wind Icon22km/h
Tue. 17, Mar.
moderate rain at timesModerate rain at times
Temperature Icon7°/-1°
Humidity Icon76%
Wind Icon23km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onWed. 18, Feb.

11.5°C

Low will be onTue. 24, Feb.

-15.7°C

HumidityHumidity

High will be onFri. 27, Feb.

100%

Low will be onThu. 12, Mar.

76%

Wind SpeedWind Speed

High will be onSat. 28, Feb.

38.2km/h

Low will be onFri. 27, Feb.

7.6km/h

PrecipitationPrecipitation

High will be onWed. 18, Feb.

20.4mm

Low will be onSat. 21, Feb.

0.02mm

Ultraviolet IndexUV

High will be onSat. 21, Feb.

2

Low will be onThu. 19, Feb.

1

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