Hamilton, Ontario, Canada Climate Change Severity

48
High
The current climate change severity in Hamilton is High, with a 8.3% improvement in the climate score compared to last 16 years. This suggests improved conditions, with more favorable environmental indicators and a reduction in negative impacts.
Data: Jan. to Aug. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Hamilton 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), Hamilton temperature has changed by around +5.6%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
3595
171.4%
cloudyCloudy
6025
-58.3%
rainyRainy
9953
-46.4%
snowySnowy
912
33.3%
mistyMisty
01
100%

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

Climate Change Indicators:

Over the past 16 years, Hamilton has experienced measurable shifts in key climate parameters, contributing to the current severity score of 48 (within the High severity category). While the score remains High, certain factors have improved over time. 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 2026, Hamilton experienced significant changes:

Temperature change of

+0.55 °C

Variation in annual rainfall

+65.37 %

Change in average humidity

-5.9 %

PM2.5 levels surged by

-20.93 %

Heatwave changed by

-3 Days

Coldwave changed by

0 Day

Wind speeds changed by

+1.33 km/h

These indicators show improvement in key parametes of climate, but Hamilton remains in the High severity category. Continuous focus on climate resilience is necessary to avoid further worsening and ensure sustainability.

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

Hamilton Weather Forecast 30 Days (September - October 2026)
Hamilton, Ontario, Canada

Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Mon. 28, Sep.
overcastOvercast
Temperature Icon19°/15°
Humidity Icon72%
Wind Icon20.9km/h
Tue. 29, Sep.
cloudyCloudy
Temperature Icon20°/15°
Humidity Icon78%
Wind Icon11.5km/h
Wed. 30, Sep.
overcastOvercast
Temperature Icon21°/16°
Humidity Icon77%
Wind Icon14km/h
Thu. 1, Oct.
overcastOvercast
Temperature Icon26°/19°
Humidity Icon62%
Wind Icon31km/h
Fri. 2, Oct.
sunnySunny
Temperature Icon20°/11°
Humidity Icon60%
Wind Icon26.3km/h
Sat. 3, Oct.
sunnySunny
Temperature Icon14°/8°
Humidity Icon55%
Wind Icon16.6km/h
Sun. 4, Oct.
overcastOvercast
Temperature Icon16°/10°
Humidity Icon76%
Wind Icon25.6km/h
Mon. 5, Oct.
patchy rain possiblePatchy rain nearby
Temperature Icon15°/10°
Humidity Icon83%
Wind Icon37.4km/h
Tue. 6, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon20°/12°
Humidity Icon78%
Wind Icon20.3km/h
Wed. 7, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon18°/11°
Humidity Icon76%
Wind Icon24.2km/h
Thu. 8, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon17°/10°
Humidity Icon73%
Wind Icon22.3km/h
Fri. 9, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon17°/10°
Humidity Icon73%
Wind Icon21.2km/h
Sat. 10, Oct.
moderate rain at timesRain
Temperature Icon18°/10°
Humidity Icon70%
Wind Icon18.1km/h
Sun. 11, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon17°/9°
Humidity Icon73%
Wind Icon22km/h
Mon. 12, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon16°/10°
Humidity Icon74%
Wind Icon22.3km/h
Tue. 13, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon16°/10°
Humidity Icon77%
Wind Icon21.6km/h
Wed. 14, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon15°/9°
Humidity Icon76%
Wind Icon21.1km/h
Thu. 15, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon15°/8°
Humidity Icon74%
Wind Icon26.6km/h
Fri. 16, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon14°/8°
Humidity Icon74%
Wind Icon22.6km/h
Sat. 17, Oct.
moderate rain at timesRain
Temperature Icon13°/7°
Humidity Icon73%
Wind Icon22.5km/h
Sun. 18, Oct.
moderate rain at timesRain
Temperature Icon14°/7°
Humidity Icon71%
Wind Icon22.9km/h
Mon. 19, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon15°/7°
Humidity Icon75%
Wind Icon25km/h
Tue. 20, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon15°/8°
Humidity Icon76%
Wind Icon24km/h
Wed. 21, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon15°/8°
Humidity Icon78%
Wind Icon24.8km/h
Thu. 22, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon14°/7°
Humidity Icon74%
Wind Icon23.2km/h
Fri. 23, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon14°/7°
Humidity Icon77%
Wind Icon22.3km/h
Sat. 24, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon13°/7°
Humidity Icon75%
Wind Icon21.9km/h
Sun. 25, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon13°/7°
Humidity Icon76%
Wind Icon21.6km/h
Mon. 26, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon12°/7°
Humidity Icon78%
Wind Icon23.3km/h
Tue. 27, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon11°/6°
Humidity Icon77%
Wind Icon22.8km/h
Wed. 28, Oct.
moderate or heavy rain showerRain Showers
Temperature Icon12°/5°
Humidity Icon78%
Wind Icon22.9km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onThu. 1, Oct.

26°C

Low will be onWed. 28, Oct.

5°C

HumidityHumidity

High will be onMon. 5, Oct.

83%

Low will be onSat. 3, Oct.

55%

Wind SpeedWind Speed

High will be onMon. 5, Oct.

37.4km/h

Low will be onTue. 29, Sep.

11.5km/h

PrecipitationPrecipitation

High will be onSun. 4, Oct.

23.9mm

Low will be onTue. 29, Sep.

0.01mm

Ultraviolet IndexUV

High will be onThu. 1, Oct.

5

Low will be onSat. 24, Oct.

2

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