S
M
T
W
T
F
S
29
45°
30°
30
45°
27°
1
44°
26°
2
42°
26°
3
44°
25°
4
42°
28°
5
41°
30°
6
46°
36°
7
51°
38°
8
56°
35°
9
57°
32°
10
46°
28°
11
44°
31°
12
44°
28°
13
45°
30°
14
42°
26°
15
47°
24°
16
41°
24°
17
39°
23°
18
39°
23°
19
40°
24°
20
40°
35°
21
49°
28°
22
50°
27°
23
44°
34°
24
48°
33°
25
53°
32°
26
48°
25°
27
44°
26°
28
47°
22°
29
46°
26°
30
37°
17°
31
50°
16°
1
34°
19°
2
36°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Riverton
Riverton's December 2026 forecast shows daily high temperatures ranging from 34° to 57°, with overnight lows between 16° and 38°. The average high for December is 45° with an average low of 27°. 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.
