S
M
T
W
T
F
S
29
49°
25°
30
45°
22°
1
36°
22°
2
34°
24°
3
36°
26°
4
41°
27°
5
45°
33°
6
46°
35°
7
48°
30°
8
49°
28°
9
46°
28°
10
37°
26°
11
40°
24°
12
37°
21°
13
33°
23°
14
34°
20°
15
34°
18°
16
30°
16°
17
29°
17°
18
29°
16°
19
30°
11°
20
28°
19°
21
31°
28°
22
37°
28°
23
42°
24°
24
39°
22°
25
33°
10°
26
31°
10°
27
28°
23°
28
35°
12°
29
35°
10°
30
27°
9°
31
25°
18°
1
28°
19°
2
36°
12°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Jamestown
Jamestown's December 2026 forecast shows daily high temperatures ranging from 25° to 49°, with overnight lows between 9° and 35°. The average high for December is 36° with an average low of 21°. 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 Jamestown. See also: January | February | March.
