S
M
T
W
T
F
S
29
40°
24°
30
38°
23°
1
39°
22°
2
39°
24°
3
42°
26°
4
45°
28°
5
48°
32°
6
44°
30°
7
39°
30°
8
37°
29°
9
38°
28°
10
37°
27°
11
50°
33°
12
47°
29°
13
50°
26°
14
49°
22°
15
36°
23°
16
37°
24°
17
36°
25°
18
37°
32°
19
43°
34°
20
48°
35°
21
49°
33°
22
49°
33°
23
48°
35°
24
51°
32°
25
52°
25°
26
51°
22°
27
36°
21°
28
37°
30°
29
45°
32°
30
46°
34°
31
48°
35°
1
49°
31°
2
50°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Pittsburgh
Pittsburgh's December 2026 forecast shows daily high temperatures ranging from 36° to 52°, with overnight lows between 21° and 35°. The average high for December is 44° 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 Pittsburgh. See also: January | February | March.
