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