S
M
T
W
T
F
S
27
73°
41°
28
73°
46°
29
76°
46°
30
78°
56°
1
85°
67°
2
75°
45°
3
67°
44°
4
78°
44°
5
68°
39°
6
70°
48°
7
75°
51°
8
71°
46°
9
70°
48°
10
73°
52°
11
74°
55°
12
75°
54°
13
71°
44°
14
65°
46°
15
66°
45°
16
65°
44°
17
60°
43°
18
67°
48°
19
59°
43°
20
60°
42°
21
56°
44°
22
55°
41°
23
60°
44°
24
58°
42°
25
53°
40°
26
52°
40°
27
52°
37°
28
53°
41°
29
59°
46°
30
63°
46°
31
61°
47°
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 52° to 78°, with overnight lows between 37° and 55°. The average high for October is 64° 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.
