Ottawa weather live forecast

Today's maximum temperature in Ottawa is expected to be 24°C. Select a day from the live weather forecast for Ottawa, Ontario, Canada for more weather parameters.

Wednesday
16th Sep
24

14

7

4
Thursday
17th Sep
21

13

7

4
Friday
18th Sep
19

10

10

4
Saturday
19th Sep
18

8

7

5
Sunday
20th Sep
20

8

10

5

5-day weather forecast updated at 04:00 on Wednesday 16th September 2026 GMT

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The 5-day weather forecast for Ontario (Ottawa) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Ottawa weather forecast by day

Below are the detailed weather forecasts for Ottawa for the next 5 days.

Ottawa weather for Wednesday 16th September 2026

Expect broken clouds in Ottawa, Ontario with a maximum temperature of 24°C, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.

24
°C maximum temperature
14
°C minimum temperature
broken clouds
7
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
24
°C wind chill
11
kph wind from NW

Ottawa weather for Thursday 17th September 2026

Expect broken clouds in Ottawa, Ontario with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north-east.

21
°C maximum temperature
13
°C minimum temperature
broken clouds
7
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
21
°C wind chill
6
kph wind from NE

Ottawa weather for Friday 18th September 2026

Expect scattered clouds in Ottawa, Ontario with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the north-west.

19
°C maximum temperature
10
°C minimum temperature
scattered clouds
10
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
19
°C wind chill
15
kph wind from NW

Ottawa weather for Saturday 19th September 2026

Expect scattered clouds in Ottawa, Ontario with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the east.

18
°C maximum temperature
8
°C minimum temperature
scattered clouds
7
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
18
°C wind chill
7
kph wind from E

Ottawa weather for Sunday 20th September 2026

Expect scattered clouds in Ottawa, Ontario with a maximum temperature of 20°C, maximum UV of 5 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north.

20
°C maximum temperature
8
°C minimum temperature
scattered clouds
10
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
20
°C wind chill
9
kph wind from N

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Ontario - quick facts
Flight time^✝	8 hours
Time difference	UK -5 to -6 hours
Language(s)	English, French
Currency	Canadian Dollar
Electricity	A + B plug (120V)
Driving side	Right
Visa^✝	Yes