S
M
T
W
T
F
S
29
63°
31°
30
65°
29°
1
51°
28°
2
48°
29°
3
52°
34°
4
58°
42°
5
58°
46°
6
64°
42°
7
65°
37°
8
65°
36°
9
52°
41°
10
57°
34°
11
54°
29°
12
51°
37°
13
53°
32°
14
51°
28°
15
49°
29°
16
49°
29°
17
50°
28°
18
47°
29°
19
50°
35°
20
53°
40°
21
56°
40°
22
63°
38°
23
56°
37°
24
54°
32°
25
54°
26°
26
48°
27°
27
50°
29°
28
52°
34°
29
56°
27°
30
48°
25°
31
46°
26°
1
48°
27°
2
50°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Upton
Upton's December 2026 forecast shows daily high temperatures ranging from 46° to 65°, with overnight lows between 25° and 46°. The average high for December is 54° with an average low of 33°. 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 Upton. See also: January | February | March.
