S
M
T
W
T
F
S
29
34°
11°
30
33°
14°
1
31°
13°
2
33°
6°
3
29°
11°
4
31°
13°
5
37°
14°
6
37°
9°
7
32°
12°
8
32°
8°
9
30°
7°
10
25°
13°
11
29°
11°
12
34°
8°
13
32°
5°
14
29°
7°
15
34°
7°
16
34°
6°
17
32°
11°
18
32°
14°
19
31°
13°
20
34°
6°
21
29°
1°
22
25°
-1°
23
22°
11°
24
23°
0°
25
28°
5°
26
32°
10°
27
28°
7°
28
Hist. Avg.
28°
4°
29
Hist. Avg.
28°
4°
30
Hist. Avg.
28°
3°
31
Hist. Avg.
28°
3°
1
Hist. Avg.
28°
3°
2
Hist. Avg.
28°
3°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Riverton
Riverton's December 2026 forecast shows daily high temperatures ranging from 22° to 37°, with overnight lows between -1° and 14°. The average high for December is 31° with an average low of 9°. 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 Riverton. See also: January | February | March.
