S
M
T
W
T
F
S
29
35°
26°
30
42°
27°
1
37°
30°
2
39°
30°
3
43°
29°
4
39°
30°
5
41°
30°
6
44°
29°
7
42°
28°
8
36°
27°
9
39°
27°
10
36°
24°
11
43°
19°
12
37°
15°
13
31°
9°
14
30°
15°
15
29°
10°
16
33°
22°
17
34°
24°
18
35°
23°
19
35°
22°
20
34°
22°
21
35°
21°
22
35°
23°
23
40°
18°
24
40°
9°
25
35°
9°
26
26°
13°
27
31°
20°
28
32°
21°
29
39°
22°
30
39°
25°
31
43°
26°
1
42°
12°
2
42°
7°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Swan
Swan's December 2026 forecast shows daily high temperatures ranging from 26° to 44°, with overnight lows between 7° and 30°. The average high for December is 37° with an average low of 21°. 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 Swan. See also: January | February | March.
