S
M
T
W
T
F
S
29
35°
25°
30
37°
30°
1
36°
31°
2
36°
33°
3
37°
32°
4
37°
27°
5
36°
25°
6
36°
31°
7
38°
29°
8
37°
28°
9
39°
27°
10
35°
28°
11
29°
21°
12
27°
27°
13
33°
32°
14
35°
34°
15
36°
36°
16
39°
29°
17
39°
27°
18
37°
22°
19
32°
17°
20
30°
22°
21
28°
19°
22
34°
14°
23
29°
18°
24
24°
24°
25
34°
33°
26
36°
28°
27
38°
26°
28
37°
17°
29
34°
13°
30
27°
18°
31
26°
17°
1
27°
15°
2
25°
16°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Penticton
Penticton's December 2026 forecast shows daily high temperatures ranging from 24° to 39°, with overnight lows between 13° and 36°. The average high for December is 34° with an average low of 25°. 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 Penticton. See also: January | February | March.
