S
M
T
W
T
F
S
27
70°
49°
28
77°
53°
29
71°
44°
30
71°
53°
1
72°
41°
2
76°
41°
3
72°
39°
4
62°
41°
5
63°
42°
6
64°
44°
7
67°
51°
8
70°
52°
9
67°
53°
10
73°
52°
11
74°
43°
12
72°
39°
13
60°
42°
14
58°
39°
15
58°
38°
16
59°
37°
17
59°
39°
18
61°
43°
19
64°
45°
20
65°
46°
21
66°
48°
22
67°
45°
23
68°
38°
24
61°
41°
25
61°
37°
26
62°
38°
27
59°
43°
28
53°
41°
29
52°
43°
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 52° to 77°, with overnight lows between 37° and 53°. The average high for October is 65° 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.
