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