S
M
T
W
T
F
S
29
42°
24°
30
36°
20°
1
34°
21°
2
34°
26°
3
36°
30°
4
45°
28°
5
44°
26°
6
39°
28°
7
40°
26°
8
41°
24°
9
43°
23°
10
36°
25°
11
Hist. Avg.
36°
21°
12
Hist. Avg.
36°
21°
13
Hist. Avg.
35°
21°
14
Hist. Avg.
35°
20°
15
Hist. Avg.
35°
20°
16
Hist. Avg.
34°
20°
17
Hist. Avg.
34°
19°
18
Hist. Avg.
34°
19°
19
Hist. Avg.
34°
19°
20
Hist. Avg.
33°
18°
21
Hist. Avg.
33°
18°
22
Hist. Avg.
33°
18°
23
Hist. Avg.
32°
18°
24
Hist. Avg.
32°
17°
25
Hist. Avg.
32°
17°
26
Hist. Avg.
32°
16°
27
Hist. Avg.
32°
16°
28
Hist. Avg.
31°
16°
29
Hist. Avg.
31°
16°
30
Hist. Avg.
31°
15°
31
Hist. Avg.
31°
15°
1
Hist. Avg.
30°
15°
2
Hist. Avg.
30°
14°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Gardiner
Gardiner's December 2026 forecast shows daily high temperatures ranging from 34° to 45°, with overnight lows between 20° and 30°. The average high for December is 39° 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 Gardiner. See also: January | February | March.