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