S
M
T
W
T
F
S
29
45°
16°
30
41°
14°
1
42°
16°
2
44°
18°
3
46°
21°
4
49°
21°
5
51°
27°
6
48°
18°
7
43°
27°
8
42°
19°
9
52°
27°
10
42°
19°
11
43°
14°
12
Hist. Avg.
45°
19°
13
Hist. Avg.
45°
19°
14
Hist. Avg.
45°
19°
15
Hist. Avg.
45°
19°
16
Hist. Avg.
44°
19°
17
Hist. Avg.
44°
19°
18
Hist. Avg.
44°
18°
19
Hist. Avg.
44°
18°
20
Hist. Avg.
44°
18°
21
Hist. Avg.
44°
18°
22
Hist. Avg.
44°
18°
23
Hist. Avg.
44°
18°
24
Hist. Avg.
44°
18°
25
Hist. Avg.
44°
18°
26
Hist. Avg.
44°
18°
27
Hist. Avg.
44°
19°
28
Hist. Avg.
44°
19°
29
Hist. Avg.
44°
19°
30
Hist. Avg.
44°
19°
31
Hist. Avg.
44°
19°
1
Hist. Avg.
44°
19°
2
Hist. Avg.
44°
19°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Fallon
Fallon's December 2026 forecast shows daily high temperatures ranging from 41° to 52°, with overnight lows between 14° and 27°. The average high for December is 45° with an average low of 20°. 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 Fallon. See also: January | February | March.
