S
M
T
W
T
F
S
27
69°
54°
28
76°
52°
29
69°
45°
30
68°
50°
1
67°
55°
2
75°
42°
3
76°
42°
4
62°
41°
5
61°
41°
6
62°
43°
7
64°
49°
8
68°
51°
9
69°
51°
10
71°
53°
11
73°
43°
12
72°
40°
13
65°
43°
14
58°
42°
15
57°
42°
16
57°
39°
17
58°
41°
18
59°
41°
19
63°
43°
20
63°
46°
21
65°
49°
22
66°
48°
23
67°
44°
24
66°
39°
25
60°
39°
26
58°
37°
27
56°
37°
28
52°
35°
29
54°
41°
30
Hist. Avg.
58°
39°
31
Hist. Avg.
57°
38°
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 52° to 76°, with overnight lows between 35° and 55°. The average high for October is 64° with an average low of 44°. 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.
