S
M
T
W
T
F
S
29
43°
31°
30
43°
29°
1
42°
28°
2
40°
27°
3
42°
27°
4
40°
29°
5
39°
32°
6
44°
37°
7
49°
39°
8
54°
36°
9
55°
33°
10
44°
29°
11
42°
32°
12
42°
29°
13
43°
31°
14
40°
27°
15
45°
24°
16
39°
25°
17
36°
24°
18
37°
24°
19
38°
25°
20
38°
35°
21
47°
29°
22
48°
28°
23
42°
34°
24
47°
34°
25
51°
32°
26
46°
26°
27
42°
27°
28
45°
23°
29
46°
27°
30
35°
16°
31
49°
17°
1
33°
20°
2
35°
22°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Glenside
Glenside's December 2026 forecast shows daily high temperatures ranging from 33° to 55°, with overnight lows between 16° and 39°. The average high for December is 43° with an average low of 28°. 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 Glenside. See also: January | February | March.
