S
M
T
W
T
F
S
28
66°
39°
29
48°
16°
30
22°
16°
31
33°
21°
1
24°
7°
2
24°
13°
3
26°
13°
4
32°
24°
5
45°
27°
6
49°
33°
7
45°
34°
8
57°
34°
9
60°
39°
10
41°
31°
11
32°
23°
12
38°
24°
13
46°
32°
14
42°
15°
15
22°
12°
16
33°
15°
17
33°
11°
18
18°
7°
19
20°
3°
20
16°
1°
21
39°
11°
22
33°
19°
23
19°
-1°
24
9°
-2°
25
15°
7°
26
11°
-2°
27
17°
-2°
28
9°
-2°
29
16°
5°
30
15°
-1°
31
15°
-6°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Ottawa
Ottawa's January 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for January is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how January weather will actually feel in Ottawa. See also: February | March | April.
