S
M
T
W
T
F
S
27
28°
9°
28
26°
7°
29
27°
4°
30
27°
16°
31
28°
19°
1
37°
13°
2
30°
12°
3
29°
14°
4
29°
14°
5
30°
22°
6
35°
24°
7
38°
15°
8
42°
6°
9
37°
11°
10
20°
16°
11
26°
15°
12
28°
13°
13
25°
12°
14
23°
9°
15
23°
12°
16
24°
14°
17
30°
18°
18
29°
8°
19
37°
5°
20
32°
7°
21
18°
14°
22
27°
17°
23
34°
19°
24
35°
22°
25
35°
22°
26
38°
21°
27
37°
19°
28
36°
20°
29
36°
20°
30
29°
14°
31
28°
6°
1
Hist. Avg.
30°
13°
2
Hist. Avg.
30°
13°
3
Hist. Avg.
30°
13°
4
Hist. Avg.
30°
13°
5
Hist. Avg.
30°
13°
6
Hist. Avg.
30°
13°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
January Weather in Hamilton
Hamilton's January 2027 forecast shows daily high temperatures ranging from 18° to 42°, with overnight lows between 4° and 24°. The average high for January is 30° with an average low of 14°. 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 Hamilton. See also: February | March | April.
