S
M
T
W
T
F
S
29
66°
48°
30
69°
46°
1
72°
49°
2
72°
43°
3
70°
36°
4
63°
32°
5
57°
28°
6
54°
28°
7
54°
30°
8
55°
29°
9
52°
29°
10
50°
27°
11
50°
28°
12
52°
32°
13
53°
30°
14
54°
28°
15
52°
28°
16
52°
29°
17
53°
28°
18
53°
35°
19
58°
40°
20
63°
40°
21
65°
44°
22
62°
47°
23
66°
44°
24
66°
45°
25
69°
44°
26
66°
44°
27
67°
43°
28
63°
46°
29
64°
45°
30
68°
41°
31
66°
34°
1
65°
31°
2
56°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Armstrong
Armstrong's December 2026 forecast shows daily high temperatures ranging from 50° to 72°, with overnight lows between 27° and 49°. The average high for December is 60° with an average low of 37°. 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 Armstrong. See also: January | February | March.