S
M
T
W
T
F
S
27
67°
47°
28
68°
50°
29
69°
50°
30
69°
49°
1
68°
49°
2
68°
50°
3
66°
49°
4
66°
50°
5
67°
48°
6
66°
48°
7
65°
47°
8
66°
48°
9
63°
35°
10
60°
44°
11
54°
46°
12
62°
44°
13
62°
42°
14
57°
44°
15
53°
44°
16
61°
43°
17
60°
42°
18
60°
42°
19
61°
45°
20
62°
43°
21
62°
40°
22
59°
40°
23
57°
29°
24
57°
32°
25
46°
38°
26
49°
39°
27
56°
37°
28
52°
37°
29
50°
33°
30
46°
29°
31
43°
29°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Ottawa
Ottawa's October 2026 forecast shows daily high temperatures ranging from 43° to 69°, with overnight lows between 29° and 50°. The average high for October is 60° with an average low of 42°. 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.
