S
M
T
W
T
F
S
29
40°
24°
30
39°
24°
1
38°
26°
2
37°
25°
3
39°
21°
4
36°
23°
5
35°
26°
6
40°
32°
7
43°
33°
8
51°
30°
9
52°
28°
10
39°
25°
11
38°
27°
12
39°
23°
13
37°
23°
14
36°
21°
15
33°
19°
16
32°
21°
17
32°
15°
18
33°
16°
19
32°
21°
20
33°
30°
21
38°
21°
22
41°
18°
23
36°
29°
24
38°
29°
25
46°
28°
26
42°
23°
27
37°
21°
28
38°
18°
29
36°
20°
30
30°
10°
31
40°
11°
1
25°
13°
2
31°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Lock Haven
Lock Haven's December 2026 forecast shows daily high temperatures ranging from 25° to 52°, with overnight lows between 10° and 33°. The average high for December is 37° 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 Lock Haven. See also: January | February | March.
