S
M
T
W
T
F
S
29
19°
4°
30
17°
3°
1
18°
8°
2
20°
16°
3
25°
15°
4
23°
15°
5
22°
16°
6
24°
17°
7
24°
12°
8
23°
10°
9
20°
13°
10
22°
11°
11
20°
6°
12
26°
1°
13
21°
5°
14
28°
15°
15
24°
8°
16
24°
7°
17
22°
16°
18
27°
18°
19
32°
17°
20
30°
15°
21
29°
16°
22
26°
16°
23
30°
13°
24
29°
15°
25
25°
6°
26
28°
-6°
27
23°
-4°
28
13°
7°
29
16°
0°
30
18°
8°
31
16°
16°
1
32°
16°
2
34°
9°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Banff
Banff's December 2026 forecast shows daily high temperatures ranging from 13° to 34°, with overnight lows between -6° and 18°. The average high for December is 24° with an average low of 10°. 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 Banff. See also: January | February | March.
