Ottawa in august: average Weather, Temperature and Climate
Weather in Ottawa in august 2025
The weather in Ottawa in august comes from statistical datas on the last years. You can view the weather statistics for the whole month, but also navigating through the tabs for the beginning, the middle and the end of the month.
Average weather throughout august
good weather UV index: 6
Weather at 6am
63°F
Clear/Sunny
41% of time
24%
14%
10%
Weather at 12pm
76°F
Clear/Sunny
39% of time
29%
22%
8%
Weather at 6pm
68°F
Clear/Sunny
40% of time
26%
19%
13%
Weather at 3am
61°F
33%
27%
20%
15%
Evolution of daily average temperature and precipitation in Ottawa in august
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Ottawa in august.
The climate of Ottawa in august is good
the weather in Ottawa in august is wet (with 5.7in of rainfall over 9 days). It should be noted an improvement from the previous month since in july it receives an average of 5.8in of precipitation over 9 days.
The climate quite good in that area august. The thermometer averaged maximum of 77°F. The seasonal minimum is 63°F. Thus, the mean temperature average on this month of august in Ottawa is 70°F. Note that these seasonal averages are in contrast with those observed in Ottawa in august with a maximum record of 92°F in 2021 and a minimum record of 47°F in 2020.
In august in Ottawa, the days on average last 14:06. Sunrise is at 05:04 and sets at 19:10.
With a good weather, august is recommended to go in this city in Canada.
Seasonal average climate and temperature of Ottawa in august
Check below seasonal norms These statistics are generated from the weather statements of the past years of the month of august.
| August | |||||
| Outside temperature | |||||
| Average temperature | 70°F | ||||
| Highest temperature | 77°F | ||||
| Lowest temperature | 63°F | ||||
| Highest record temperature | 92°F (2021) | ||||
| Lowest record temperature | 47°F (2020) | ||||
| Number of days at +86°F | 2 day(s) (6%) | ||||
| Number of days at +65°F | 30 day(s) (97%) | ||||
| Wind | |||||
| Wind speed | 14km/h | ||||
| Wind temperature | 63°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 5.7in | ||||
| Number of days with rainfall | 9 day(s) (29%) | ||||
| Record daily rainfall | 2.4in (2016) | ||||
| Other climate data | |||||
| Humidity | 88% | ||||
| Visibility | 8.75km | ||||
| Cloud cover | 33% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 14 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 05:04 | ||||
| Time of sunset | 19:10 | ||||
| Length of day | 14:06 | ||||
| Our opinion about the weather in august | |||||
| Our opinion at whereandwhen.net | good | ||||
How was the weather last august?
Here is the day by day recorded weather in Ottawa in august 2024:
68°F to 86°F
67°F to 88°F
68°F to 81°F
65°F to 86°F
63°F to 72°F
52°F to 74°F
52°F to 74°F
52°F to 70°F
65°F to 68°F
56°F to 72°F
52°F to 67°F
54°F to 70°F
52°F to 79°F
61°F to 81°F
59°F to 83°F
63°F to 83°F
65°F to 68°F
67°F to 70°F
56°F to 65°F
50°F to 59°F
50°F to 67°F
54°F to 68°F
54°F to 77°F
54°F to 74°F
59°F to 77°F
61°F to 81°F
61°F to 85°F
59°F to 68°F
49°F to 70°F
49°F to 68°F
63°F to 72°F
Map: other cities in Canada in august
Cities near Ottawa:
| Kingston in august | good weather |
| Orillia in august | good weather |
| North Bay in august | good weather |
| Toronto in august | good weather |
| Quebec City in august | good weather |
| Brampton in august | good weather |
| Niagara Falls (Ontario) in august | good weather |
| Owen Sound in august | good weather |
| Greater Sudbury in august | good weather |
| Bruce Peninsula in august | good weather |
| Timmins in august | good weather |
| Sault Ste. Marie in august | good weather |
Click over cities on the map for information about the weather in august.
Ottawa
perfect weather
good
tolerable
bad
very bad
Weather data for Ottawa in august:
Weather data for Ottawa for august are derived from an average of the weather forecast since 2009 in Ottawa. There is a margin of error and these forecasts are to be considered as general information only. The weather in Ottawa can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Ottawa.