Ottawa weather live forecast

Today's maximum temperature in Ottawa is expected to be 79°F. Select a day from the live weather forecast for Ottawa, Ontario, Canada for more weather parameters.

Tuesday
16th Sep
79

54

12

6
Wednesday
17th Sep
77

55

9

5
Thursday
18th Sep
79

57

7

5
Friday
19th Sep
66

48

12

5
Saturday
20th Sep
66

45

11

5

5-day weather forecast updated at 04:00 on Tuesday 16th September 2025 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 Tuesday 16th September 2025

Expect clear skies in Ottawa, Ontario with a maximum temperature of 79°F, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 4 mph from the east.

79
°F maximum temperature
54
°F minimum temperature
clear skies
12
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
79
°F wind chill
4
mph wind from E

Ottawa weather for Wednesday 17th September 2025

Expect scattered clouds in Ottawa, Ontario with a maximum temperature of 77°F, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 4 mph from the south-west.

77
°F maximum temperature
55
°F minimum temperature
scattered clouds
9
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
77
°F wind chill
4
mph wind from SW

Ottawa weather for Thursday 18th September 2025

Expect sunshine and showers in Ottawa, Ontario with a maximum temperature of 79°F, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 19% chance of some rain and a gentle breeze of 9 mph from the north-west.

79
°F maximum temperature
57
°F minimum temperature
sunshine and showers
7
hours of sunshine
5
UV index (Moderate)
19
% chance of some rain
<2
mm of rainfall expected
79
°F wind chill
9
mph wind from NW

Ottawa weather for Friday 19th September 2025

Expect scattered clouds in Ottawa, Ontario with a maximum temperature of 66°F, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 10 mph from the north.

66
°F maximum temperature
48
°F minimum temperature
scattered clouds
12
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
66
°F wind chill
10
mph wind from N

Ottawa weather for Saturday 20th September 2025

Expect clear skies in Ottawa, Ontario with a maximum temperature of 66°F, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the east.

66
°F maximum temperature
45
°F minimum temperature
clear skies
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
66
°F wind chill
6
mph wind from E

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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
Why visit?	Nature
Tourist info	Destination Ontario