Weather in Ottawa: August
 |
Average day temperature: | 76.4°F |
| Average night temperature: | 61.1°F | |
 |
Number of sunny days: | 14 days |
| Day length: | 13.3 - 14.7 hours | |
 |
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:
2025
2024
2023
The highest day temperature during August of 2025 was 95°F. At the same time the lowest night temperature was 51°F. Daily and nightly averages during August were 79.3°F and 62.0°F.
Sunny, partly cloudy and cloudy days
Number of sunny, partly cloudy and cloudy days in August is almost equal.
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 6.3 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: 7.9.
Best time for vacation in Ottawa
Ottawa on a weather map
Places in Canada:
Name
°F
24 Hours Forecast
Ottawa
Local time: 17:50
January 11, sunday
1800
27°F
N
6 mph
6 mph
2100
23°F
SE
13 mph
13 mph
January 12, monday
0000
18°F
SE
16 mph
16 mph
0300
14°F
E
12 mph
12 mph
0600
10°F
E
11 mph
11 mph
0900
12°F
E
6 mph
6 mph
1200
19°F
NE
7 mph
7 mph
1500
25°F
NE
9 mph
9 mph
