Weather in Ottawa: August
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Average day temperature: | 76.3°F |
| Average night temperature: | 61.0°F | |
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Number of sunny days: | 15 days |
| Day length: | 13.3 - 14.7 hours | |
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Number of rainy days: | 5 days |
| Precipitation totals: | 2.8 in. | |
| more information | ||
14 days
forecast
forecast
| Ottawa |
weather in
September
September
| Ottawa |
Air temperature in August, °F
Show year:
2026
2025
2024
The highest day temperature during August of 2026 was 85°F. At the same time the lowest night temperature was 49°F. Daily and nightly averages during August were 74.9°F and 60.9°F.
Sunny, partly cloudy and cloudy days
Mostly all days in August are sunny but cloudy days are also possible.
Precipitation total in August, in.
Precipitation total value in Ottawa in August is 2.7 in. Other months of the year show relatively similar values.
Wind speed in August, mph
The average wind speed value in August is 6.2 mph It makes August lest windy month of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 8.1.
Best time for vacation in Ottawa
Ottawa on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Ottawa
Local time: 16:08
October 05, monday
1800
46°F
E
15 mph
15 mph
2100
41°F
SE
14 mph
14 mph
October 06, tuesday
0000
39°F
E
13 mph
13 mph
0300
37°F
SE
12 mph
12 mph
0600
39°F
E
11 mph
11 mph
0900
39°F
SE
13 mph
13 mph
1200
48°F
SE
11 mph
11 mph
1500
54°F
E
11 mph
11 mph
