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