Average data for 10 years
1 August
Thursday
+29°
+21°
2 August
Friday
+29°
+23°
3 August
Saturday
+27°
+22°
4 August
Sunday
+28°
+21°
5 August
Monday
+27°
+22°
6 August
Tuesday
+27°
+21°
7 August
Wednesday
+28°
+21°
8 August
Thursday
+28°
+22°
9 August
Friday
+27°
+22°
10 August
Saturday
+26°
+20°
11 August
Sunday
+27°
+20°
12 August
Monday
+26°
+21°
13 August
Tuesday
+26°
+20°
14 August
Wednesday
+27°
+19°
15 August
Thursday
+27°
+20°
16 August
Friday
+26°
+21°
17 August
Saturday
+27°
+20°
18 August
Sunday
+27°
+21°
19 August
Monday
+27°
+21°
20 August
Tuesday
+27°
+21°
21 August
Wednesday
+26°
+20°
22 August
Thursday
+26°
+20°
23 August
Friday
+28°
+19°
24 August
Saturday
+27°
+20°
25 August
Sunday
+26°
+20°
26 August
Monday
+26°
+20°
27 August
Tuesday
+26°
+19°
28 August
Wednesday
+26°
+20°
29 August
Thursday
+26°
+21°
30 August
Friday
+27°
+20°
31 August
Saturday
+28°
+22°
August in Ottawa is the sunniest month of the year. In August, the weather in Ottawa is typically warm. Average daily high temperature in August is about 27 degrees above zero. On average, Ottawa has 22 sunny, 6 partly cloudy, and 3 rainy days in August. The rains are usually light. August as well as September is considered the most comfortable time to visit Ottawa.