Hamilton, Ontario, Canada Climate Change Severity

48
High
The current climate change severity in Hamilton is High, with a 5.5% 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 Sep. (Historical Vs 2026) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100


Hamilton Weather Condition Changes (Historic Vs 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 +5.3%, and has experienced notable climate changes.

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

Comparison of Weather Condition (Historic Vs 2026)

HistoricDays

Year 2026Days

Change

sunnySunny
42109
159.5%

cloudyCloudy
6925
-63.7%

rainyRainy
11056
-49.09%

snowySnowy
912
33.3%

mistyMisty
11
0%

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

+0.57 °C


Variation in annual rainfall

+60.69 %


Change in average humidity

-6.45 %


PM2.5 levels surged by

-19.55 %


Heatwave changed by

-1 Days


Coldwave changed by

0 Day


Wind speeds changed by

+1.36 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 Sep.

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


Condition
Temperature IconTemperature
Humidity IconHumi.
Wind IconWind Speed
Sat. 3, Oct.
sunnySunny

Temperature Icon15°/10°

Humidity Icon62%

Wind Icon16.6km/h
Sun. 4, Oct.
sunnySunny

Temperature Icon21°/11°

Humidity Icon63%

Wind Icon15.8km/h
Mon. 5, Oct.
sunnySunny

Temperature Icon17°/10°

Humidity Icon53%

Wind Icon27km/h
Tue. 6, Oct.
sunnySunny

Temperature Icon16°/8°

Humidity Icon58%

Wind Icon16.2km/h
Wed. 7, Oct.
sunnySunny

Temperature Icon21°/11°

Humidity Icon61%

Wind Icon28.1km/h
Thu. 8, Oct.
overcastOvercast

Temperature Icon21°/13°

Humidity Icon62%

Wind Icon28.8km/h
Fri. 9, Oct.
sunnySunny

Temperature Icon21°/11°

Humidity Icon54%

Wind Icon19.4km/h
Sat. 10, Oct.
partly cloudyPartly Cloudy

Temperature Icon14°/12°

Humidity Icon69%

Wind Icon19.1km/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
Thu. 29, Oct.
moderate or heavy rain showerRain Showers

Temperature Icon11°/6°

Humidity Icon78%

Wind Icon25.5km/h
Fri. 30, Oct.
moderate or heavy rain showerRain Showers

Temperature Icon11°/6°

Humidity Icon78%

Wind Icon24.7km/h
Sat. 31, Oct.
moderate or heavy rain showerRain Showers

Temperature Icon11°/6°

Humidity Icon80%

Wind Icon26km/h
Sun. 1, Nov.
moderate or heavy rain showerRain Showers

Temperature Icon11°/5°

Humidity Icon76%

Wind Icon25.7km/h
Mon. 2, Nov.
moderate or heavy rain showerRain Showers

Temperature Icon10°/4°

Humidity Icon75%

Wind Icon20.6km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onSun. 4, Oct.

21°C


Low will be onMon. 2, Nov.

4°C

HumidityHumidity

High will be onSat. 31, Oct.

80%


Low will be onMon. 5, Oct.

53%

Wind SpeedWind Speed

High will be onThu. 8, Oct.

28.8km/h


Low will be onSun. 4, Oct.

15.8km/h

PrecipitationPrecipitation

High will be onTue. 27, Oct.

5.4mm


Low will be onSun. 4, Oct.

0.09mm

Ultraviolet IndexUV

High will be onThu. 8, Oct.

6


Low will be onSat. 24, Oct.

2