S
M
T
W
T
F
S
29
51°
40°
30
54°
40°
1
51°
38°
2
50°
33°
3
42°
30°
4
47°
31°
5
52°
38°
6
47°
34°
7
40°
25°
8
39°
23°
9
38°
23°
10
38°
28°
11
40°
33°
12
42°
28°
13
43°
25°
14
39°
22°
15
38°
27°
16
38°
31°
17
40°
29°
18
44°
27°
19
42°
22°
20
38°
21°
21
36°
21°
22
36°
23°
23
40°
26°
24
38°
25°
25
37°
20°
26
37°
18°
27
35°
20°
28
34°
20°
29
35°
19°
30
36°
22°
31
38°
19°
1
37°
17°
2
35°
14°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Galena
Galena's December 2026 forecast shows daily high temperatures ranging from 34° to 54°, with overnight lows between 14° and 40°. The average high for December is 41° with an average low of 26°. 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 Galena. See also: January | February | March.
