S
M
T
W
T
F
S
27
78°
45°
28
75°
44°
29
67°
44°
30
66°
44°
1
67°
48°
2
66°
45°
3
67°
43°
4
70°
44°
5
72°
49°
6
73°
50°
7
68°
41°
8
69°
40°
9
62°
39°
10
61°
40°
11
60°
38°
12
62°
36°
13
58°
39°
14
59°
45°
15
60°
47°
16
61°
47°
17
61°
48°
18
63°
44°
19
70°
39°
20
58°
40°
21
59°
35°
22
58°
43°
23
57°
45°
24
66°
42°
25
64°
42°
26
Hist. Avg.
59°
39°
27
Hist. Avg.
59°
39°
28
Hist. Avg.
58°
38°
29
Hist. Avg.
58°
38°
30
Hist. Avg.
57°
38°
31
Hist. Avg.
56°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Ottawa
Ottawa's October 2026 forecast shows daily high temperatures ranging from 57° to 78°, with overnight lows between 35° and 50°. The average high for October is 65° with an average low of 43°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Ottawa. See also: November | December | January.
