Ottawa, Ontario, Canada Climate Change Severity

57
High
The current climate change severity in Ottawa is High, with a 18.7% 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 May (Historical Vs 2025) - Weather Data Only
Low
020
Moderate
40
High
60
Very High
80
Extreme
100
°C

Ottawa 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), Ottawa temperature has changed by around -105.7%, and has experienced notable climate changes.

Sunny
Cloudy
Rainy
Snowy
Misty

Data: Jan. to May (Historical Vs 2025)

Comparison of Weather Condition (Historic Vs 2025)

HistoricDays

Year 2025Days

Change

sunnySunny
1812
-33.3%
cloudyCloudy
4120
-51.2%
rainyRainy
6852
-23.5%
snowySnowy
1316
23.07%
mistyMisty
01
100%

Climate Change Indicators:

Over the past 15 years, Ottawa 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, Ottawa experienced significant changes:

Temperature change of

-3.1 °C

Variation in annual rainfall

+7.3 %

Change in average humidity

-7.1 %

PM2.5 levels surged by

-39.07 %

Heatwave changed by

-4.06 day(s)

Coldwave changed by

-6.8 day(s)

Wind speeds changed by

+2.3 km/h

These indicators show that Ottawa 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 May

Ottawa Weather Forecast 30 Days (July 2025)
Ottawa, Ontario, Canada

Condition
Temperature IconTemperature
Humidity Iconhumi.
Wind IconWind Speed
Tue. 1, Jul.
partly cloudyPartly Cloudy
Temperature Icon31°/21°
Humidity Icon71%
Wind Icon19km/h
Wed. 2, Jul.
sunnySunny
Temperature Icon29°/18°
Humidity Icon65%
Wind Icon18km/h
Thu. 3, Jul.
overcastOvercast
Temperature Icon28°/18°
Humidity Icon66%
Wind Icon19km/h
Fri. 4, Jul.
sunnySunny
Temperature Icon24°/10°
Humidity Icon62%
Wind Icon13km/h
Sat. 5, Jul.
patchy rain possiblePatchy rain nearby
Temperature Icon25°/12°
Humidity Icon77%
Wind Icon22km/h
Sun. 6, Jul.
patchy rain possiblePatchy rain nearby
Temperature Icon21°/20°
Humidity Icon97%
Wind Icon14km/h
Mon. 7, Jul.
patchy rain possiblePatchy rain nearby
Temperature Icon28°/17°
Humidity Icon90%
Wind Icon21km/h
Tue. 8, Jul.
partly cloudyPartly Cloudy
Temperature Icon24°/14°
Humidity Icon80%
Wind Icon8km/h
Wed. 9, Jul.
cloudyCloudy
Temperature Icon26°/17°
Humidity Icon84%
Wind Icon11km/h
Thu. 10, Jul.
patchy rain possiblePatchy rain nearby
Temperature Icon27°/16°
Humidity Icon87%
Wind Icon18km/h
Fri. 11, Jul.
partly cloudyPartly Cloudy
Temperature Icon24°/18°
Humidity Icon78%
Wind Icon16km/h
Sat. 12, Jul.
sunnySunny
Temperature Icon24°/11°
Humidity Icon70%
Wind Icon17km/h
Sun. 13, Jul.
sunnySunny
Temperature Icon25°/13°
Humidity Icon61%
Wind Icon10km/h
Mon. 14, Jul.
sunnySunny
Temperature Icon26°/13°
Humidity Icon68%
Wind Icon13km/h
Tue. 15, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/16°
Humidity Icon78%
Wind Icon13km/h
Wed. 16, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/17°
Humidity Icon80%
Wind Icon13km/h
Thu. 17, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon27°/17°
Humidity Icon78%
Wind Icon14km/h
Fri. 18, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/16°
Humidity Icon78%
Wind Icon14km/h
Sat. 19, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon27°/17°
Humidity Icon79%
Wind Icon16km/h
Sun. 20, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon27°/16°
Humidity Icon78%
Wind Icon14km/h
Mon. 21, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/17°
Humidity Icon79%
Wind Icon16km/h
Tue. 22, Jul.
moderate rain at timesModerate rain at times
Temperature Icon26°/17°
Humidity Icon76%
Wind Icon15km/h
Wed. 23, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/16°
Humidity Icon80%
Wind Icon15km/h
Thu. 24, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon24°/15°
Humidity Icon79%
Wind Icon15km/h
Fri. 25, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/16°
Humidity Icon80%
Wind Icon15km/h
Sat. 26, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/16°
Humidity Icon78%
Wind Icon14km/h
Sun. 27, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/17°
Humidity Icon80%
Wind Icon14km/h
Mon. 28, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon26°/17°
Humidity Icon78%
Wind Icon14km/h
Tue. 29, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon24°/16°
Humidity Icon78%
Wind Icon14km/h
Wed. 30, Jul.
moderate or heavy rain showerModerate or heavy rain shower
Temperature Icon25°/15°
Humidity Icon76%
Wind Icon14km/h
Thu. 31, Jul.
moderate rain at timesModerate rain at times
Temperature Icon25°/15°
Humidity Icon75%
Wind Icon14km/h

Highest & Lowest Weather Forecasts

TemperatureTemperature

High will be onTue. 1, Jul.

30.7°C

Low will be onFri. 4, Jul.

10.4°C

HumidityHumidity

High will be onSun. 6, Jul.

97%

Low will be onSun. 13, Jul.

61%

Wind SpeedWind Speed

High will be onSat. 5, Jul.

21.6km/h

Low will be onTue. 8, Jul.

7.9km/h

PrecipitationPrecipitation

High will be onFri. 25, Jul.

8.9mm

Low will be onFri. 4, Jul.

0.02mm

Ultraviolet IndexUV

High will be onFri. 11, Jul.

6

Low will be onSat. 5, Jul.

0.2

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