Mississauga, Ontario, Canada Climate Change Severity

48
High
The current climate change severity in Mississauga is High, with a 7.5% improvement in the climate score compared to last 15 years. This suggests improved conditions, with more favorable environmental indicators and a reduction in negative impacts.
Data: Jan. to Sep. (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C (c)

Mississauga 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), Mississauga temperature has changed by around -4.4%, 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
4219
-54.7%
cloudyCloudy
6969
0%
rainyRainy
11087
-20.9%
snowySnowy
89
12.5%
mistyMisty
06
100%

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

Climate Change Indicators:

Over the past 15 years, Mississauga 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 2025, Mississauga experienced significant changes:

Temperature change of

-0.4 °C

Variation in annual rainfall

+32.3 %

Change in average humidity

+4.6 %

PM2.5 levels surged by

-16.7 %

Heatwave changed by

-5.5 day(s)

Coldwave changed by

-8.3 day(s)

Wind speeds changed by

-0.06 km/h

These indicators show improvement in key parametes of climate, but Mississauga 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.

Mississauga Weather Forecast 30 Days (October - November 2025)
Mississauga, Ontario, Canada

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Wed. 29, Oct.
cloudyCloudy
Temperature Icon11°/7°
Humidity Icon78%
Wind Icon21km/h
Thu. 30, Oct.
heavy rainHeavy rain
Temperature Icon9°/7°
Humidity Icon89%
Wind Icon33km/h
Fri. 31, Oct.
heavy rainHeavy rain
Temperature Icon8°/5°
Humidity Icon86%
Wind Icon28km/h
Sat. 1, Nov.
partly cloudyPartly Cloudy
Temperature Icon10°/5°
Humidity Icon61%
Wind Icon19km/h
Sun. 2, Nov.
sunnySunny
Temperature Icon10°/4°
Humidity Icon59%
Wind Icon10km/h
Mon. 3, Nov.
sunnySunny
Temperature Icon13°/6°
Humidity Icon66%
Wind Icon12km/h
Tue. 4, Nov.
moderate rainModerate rain
Temperature Icon9°/6°
Humidity Icon82%
Wind Icon32km/h
Wed. 5, Nov.
patchy rain possiblePatchy rain nearby
Temperature Icon7°/2°
Humidity Icon64%
Wind Icon36km/h
Thu. 6, Nov.
overcastOvercast
Temperature Icon8°/2°
Humidity Icon60%
Wind Icon26km/h
Fri. 7, Nov.
patchy rain possiblePatchy rain nearby
Temperature Icon14°/7°
Humidity Icon65%
Wind Icon34km/h
Sat. 8, Nov.
overcastOvercast
Temperature Icon7°/4°
Humidity Icon55%
Wind Icon14km/h
Sun. 9, Nov.
cloudyCloudy
Temperature Icon8°/2°
Humidity Icon58%
Wind Icon12km/h
Mon. 10, Nov.
patchy rain possiblePatchy rain nearby
Temperature Icon12°/6°
Humidity Icon68%
Wind Icon42km/h
Tue. 11, Nov.
patchy rain possiblePatchy rain nearby
Temperature Icon13°/8°
Humidity Icon75%
Wind Icon25km/h
Wed. 12, Nov.
heavy rain at timesHeavy rain at times
Temperature Icon8°/3°
Humidity Icon70%
Wind Icon23km/h
Thu. 13, Nov.
patchy rain possiblePatchy rain possible
Temperature Icon7°/2°
Humidity Icon72%
Wind Icon26km/h
Fri. 14, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon7°/3°
Humidity Icon73%
Wind Icon23km/h
Sat. 15, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/3°
Humidity Icon77%
Wind Icon23km/h
Sun. 16, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/3°
Humidity Icon78%
Wind Icon23km/h
Mon. 17, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/2°
Humidity Icon79%
Wind Icon26km/h
Tue. 18, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon8°/2°
Humidity Icon76%
Wind Icon27km/h
Wed. 19, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon7°/2°
Humidity Icon75%
Wind Icon26km/h
Thu. 20, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon6°/2°
Humidity Icon73%
Wind Icon28km/h
Fri. 21, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon6°/1°
Humidity Icon76%
Wind Icon27km/h
Sun. 23, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon6°/0°
Humidity Icon77%
Wind Icon25km/h
Mon. 24, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon6°/1°
Humidity Icon77%
Wind Icon25km/h
Tue. 25, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon7°/2°
Humidity Icon80%
Wind Icon25km/h
Wed. 26, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon7°/2°
Humidity Icon78%
Wind Icon25km/h
Thu. 27, Nov.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon6°/1°
Humidity Icon77%
Wind Icon28km/h
Fri. 28, Nov.
moderate rain at timesModerate rain at times
Temperature Icon4°/0°
Humidity Icon75%
Wind Icon24km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onFri. 7, Nov.

14°C

Low will be onSun. 23, Nov.

0.4°C

HumidityHumidity

High will be onThu. 30, Oct.

89%

Low will be onSat. 8, Nov.

55%

Wind SpeedWind Speed

High will be onMon. 10, Nov.

41.8km/h

Low will be onSun. 2, Nov.

10.1km/h

PrecipitationPrecipitation

High will be onFri. 31, Oct.

67.3mm

Low will be onSat. 1, Nov.

0.01mm

Ultraviolet IndexUV

High will be onMon. 3, Nov.

3

Low will be onWed. 5, Nov.

1

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