S
M
T
W
T
F
S
29
47°
25°
30
48°
23°
1
47°
24°
2
39°
15°
3
38°
13°
4
35°
23°
5
38°
26°
6
39°
29°
7
47°
30°
8
53°
26°
9
40°
21°
10
52°
28°
11
54°
24°
12
Hist. Avg.
42°
22°
13
Hist. Avg.
41°
22°
14
Hist. Avg.
41°
22°
15
Hist. Avg.
41°
22°
16
Hist. Avg.
41°
22°
17
Hist. Avg.
40°
21°
18
Hist. Avg.
40°
21°
19
Hist. Avg.
40°
21°
20
Hist. Avg.
40°
21°
21
Hist. Avg.
40°
21°
22
Hist. Avg.
39°
20°
23
Hist. Avg.
39°
20°
24
Hist. Avg.
39°
20°
25
Hist. Avg.
39°
20°
26
Hist. Avg.
39°
20°
27
Hist. Avg.
39°
20°
28
Hist. Avg.
39°
20°
29
Hist. Avg.
39°
20°
30
Hist. Avg.
38°
20°
31
Hist. Avg.
38°
19°
1
Hist. Avg.
38°
19°
2
Hist. Avg.
38°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Beloit
Beloit's December 2026 forecast shows daily high temperatures ranging from 35° to 54°, with overnight lows between 13° and 30°. The average high for December is 44° with an average low of 24°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Beloit. See also: January | February | March.
