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