Greater Sudbury, Ontario, Canada Climate Change Severity

48
High
The current climate change severity in Greater Sudbury is High, with a 7.1% 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 Aug. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Greater Sudbury 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), Greater Sudbury temperature has changed by around +1.3%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
2719
-29.6%
cloudyCloudy
5037
-26%
rainyRainy
9371
-23.6%
snowySnowy
1419
35.7%
mistyMisty
07
100%

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

Climate Change Indicators:

Over the past 15 years, Greater Sudbury has experienced measurable shifts in key climate parameters, contributing to the current severity score of 48 (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

48/100

High

Low
020
Moderate
40
High
60
Very High
80
Extreme
100

From 2010 to 2025, Greater Sudbury experienced significant changes:

Temperature change of

+0.07 °C

Variation in annual rainfall

+97.4 %

Change in average humidity

-8.5 %

PM2.5 levels surged by

+100 %

Heatwave changed by

-4.4 day(s)

Coldwave changed by

-6.1 day(s)

Wind speeds changed by

+0.7 km/h

These indicators show that Greater Sudbury 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 Aug.

Greater Sudbury Weather Forecast 30 Days (September - October 2025)
Greater Sudbury, Ontario, Canada

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Fri. 19, Sep.
sunnySunny
Temperature Icon15°/8°
Humidity Icon68%
Wind Icon12km/h
Sat. 20, Sep.
sunnySunny
Temperature Icon18°/4°
Humidity Icon58%
Wind Icon12km/h
Sun. 21, Sep.
heavy rainHeavy rain
Temperature Icon17°/8°
Humidity Icon69%
Wind Icon12km/h
Mon. 22, Sep.
heavy rainHeavy rain
Temperature Icon21°/14°
Humidity Icon91%
Wind Icon7km/h
Tue. 23, Sep.
moderate rainModerate rain
Temperature Icon17°/14°
Humidity Icon93%
Wind Icon21km/h
Wed. 24, Sep.
sunnySunny
Temperature Icon20°/10°
Humidity Icon68%
Wind Icon18km/h
Thu. 25, Sep.
sunnySunny
Temperature Icon20°/8°
Humidity Icon66%
Wind Icon10km/h
Fri. 26, Sep.
sunnySunny
Temperature Icon22°/8°
Humidity Icon72%
Wind Icon11km/h
Sat. 27, Sep.
sunnySunny
Temperature Icon21°/8°
Humidity Icon71%
Wind Icon18km/h
Sun. 28, Sep.
sunnySunny
Temperature Icon17°/4°
Humidity Icon57%
Wind Icon12km/h
Mon. 29, Sep.
sunnySunny
Temperature Icon20°/6°
Humidity Icon73%
Wind Icon13km/h
Tue. 30, Sep.
patchy rain possiblePatchy rain nearby
Temperature Icon23°/11°
Humidity Icon76%
Wind Icon14km/h
Wed. 1, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon13°/4°
Humidity Icon92%
Wind Icon31km/h
Thu. 2, Oct.
partly cloudyPartly Cloudy
Temperature Icon9°/2°
Humidity Icon60%
Wind Icon30km/h
Fri. 3, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/6°
Humidity Icon79%
Wind Icon16km/h
Sat. 4, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon15°/7°
Humidity Icon81%
Wind Icon15km/h
Sun. 5, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon14°/6°
Humidity Icon76%
Wind Icon16km/h
Mon. 6, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon14°/6°
Humidity Icon79%
Wind Icon17km/h
Tue. 7, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/5°
Humidity Icon80%
Wind Icon19km/h
Wed. 8, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/4°
Humidity Icon81%
Wind Icon17km/h
Thu. 9, Oct.
heavy rain at timesHeavy rain at times
Temperature Icon13°/6°
Humidity Icon80%
Wind Icon16km/h
Fri. 10, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/4°
Humidity Icon80%
Wind Icon15km/h
Sat. 11, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/4°
Humidity Icon79%
Wind Icon16km/h
Sun. 12, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon13°/5°
Humidity Icon79%
Wind Icon17km/h
Mon. 13, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon11°/5°
Humidity Icon87%
Wind Icon16km/h
Tue. 14, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon11°/5°
Humidity Icon82%
Wind Icon16km/h
Wed. 15, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon10°/3°
Humidity Icon85%
Wind Icon20km/h
Thu. 16, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon9°/2°
Humidity Icon81%
Wind Icon17km/h
Fri. 17, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon9°/2°
Humidity Icon77%
Wind Icon17km/h
Sat. 18, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon10°/2°
Humidity Icon77%
Wind Icon19km/h
Sun. 19, Oct.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon11°/3°
Humidity Icon81%
Wind Icon18km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onTue. 30, Sep.

23.2°C

Low will be onThu. 2, Oct.

2.1°C

HumidityHumidity

High will be onTue. 23, Sep.

93%

Low will be onSun. 28, Sep.

57%

Wind SpeedWind Speed

High will be onWed. 1, Oct.

30.6km/h

Low will be onMon. 22, Sep.

6.5km/h

PrecipitationPrecipitation

High will be onMon. 22, Sep.

51.8mm

Low will be onTue. 30, Sep.

0.1mm

Ultraviolet IndexUV

High will be onWed. 24, Sep.

4

Low will be onWed. 1, Oct.

2

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