S
M
T
W
T
F
S
27
74°
46°
28
75°
47°
29
81°
51°
30
64°
59°
1
69°
49°
2
67°
43°
3
72°
44°
4
74°
46°
5
71°
46°
6
74°
47°
7
80°
51°
8
76°
50°
9
65°
51°
10
81°
57°
11
80°
50°
12
86°
62°
13
78°
62°
14
65°
57°
15
65°
45°
16
57°
44°
17
57°
36°
18
63°
37°
19
69°
38°
20
72°
40°
21
72°
41°
22
74°
45°
23
74°
46°
24
71°
48°
25
76°
47°
26
71°
49°
27
71°
53°
28
71°
55°
29
74°
53°
30
71°
55°
31
66°
56°
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 66° to 76°, with overnight lows between 47° and 56°. The average high for October is 71° with an average low of 53°. 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.
