S
M
T
W
T
F
S
27
82°
47°
28
72°
47°
29
68°
46°
30
71°
47°
1
70°
46°
2
69°
48°
3
70°
44°
4
73°
43°
5
75°
48°
6
77°
44°
7
77°
41°
8
67°
42°
9
66°
51°
10
68°
39°
11
68°
37°
12
65°
37°
13
61°
41°
14
64°
52°
15
68°
50°
16
70°
50°
17
64°
49°
18
71°
43°
19
72°
39°
20
67°
43°
21
71°
46°
22
68°
48°
23
66°
49°
24
70°
38°
25
66°
41°
26
Hist. Avg.
63°
42°
27
Hist. Avg.
62°
42°
28
Hist. Avg.
62°
42°
29
Hist. Avg.
61°
41°
30
Hist. Avg.
61°
41°
31
Hist. Avg.
60°
40°
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 61° to 82°, with overnight lows between 37° and 52°. The average high for October is 70° with an average low of 45°. 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.
