S
M
T
W
T
F
S
29
45°
20°
30
42°
18°
1
43°
26°
2
48°
27°
3
43°
25°
4
42°
22°
5
42°
21°
6
41°
20°
7
42°
22°
8
48°
26°
9
48°
24°
10
46°
25°
11
49°
26°
12
48°
25°
13
48°
26°
14
48°
25°
15
50°
18°
16
46°
19°
17
45°
20°
18
49°
22°
19
53°
20°
20
51°
20°
21
48°
21°
22
49°
24°
23
51°
24°
24
50°
28°
25
51°
25°
26
49°
15°
27
46°
19°
28
39°
25°
29
45°
22°
30
48°
25°
31
51°
27°
1
53°
24°
2
50°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Fallon
Fallon's December 2026 forecast shows daily high temperatures ranging from 39° to 53°, with overnight lows between 15° and 28°. The average high for December is 47° with an average low of 23°. 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.
