S
M
T
W
T
F
S
27
27°
5°
28
27°
4°
29
25°
7°
30
22°
-6°
31
25°
-14°
1
26°
-14°
2
6°
-7°
3
10°
-6°
4
10°
1°
5
18°
8°
6
26°
6°
7
25°
1°
8
26°
7°
9
25°
8°
10
28°
6°
11
29°
4°
12
23°
-11°
13
20°
2°
14
25°
1°
15
27°
-11°
16
Hist. Avg.
14°
-7°
17
Hist. Avg.
14°
-7°
18
Hist. Avg.
14°
-7°
19
Hist. Avg.
14°
-7°
20
Hist. Avg.
15°
-8°
21
Hist. Avg.
15°
-8°
22
Hist. Avg.
15°
-8°
23
Hist. Avg.
15°
-8°
24
Hist. Avg.
15°
-8°
25
Hist. Avg.
15°
-7°
26
Hist. Avg.
16°
-7°
27
Hist. Avg.
16°
-7°
28
Hist. Avg.
16°
-7°
29
Hist. Avg.
16°
-7°
30
Hist. Avg.
16°
-7°
31
Hist. Avg.
17°
-7°
1
Hist. Avg.
17°
-7°
2
Hist. Avg.
17°
-6°
3
Hist. Avg.
18°
-6°
4
Hist. Avg.
18°
-6°
5
Hist. Avg.
18°
-6°
6
Hist. Avg.
18°
-5°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
January Weather in Thunder Bay
Thunder Bay's January 2027 forecast shows daily high temperatures ranging from 6° to 29°, with overnight lows between -14° and 8°. The average high for January is 23° with an average low of -0°. 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 Thunder Bay. See also: February | March | April.
