S
M
T
W
T
F
S
29
57°
40°
30
59°
36°
1
55°
29°
2
50°
25°
3
40°
31°
4
46°
33°
5
44°
30°
6
42°
33°
7
45°
33°
8
50°
27°
9
50°
29°
10
41°
26°
11
38°
22°
12
37°
23°
13
36°
20°
14
36°
19°
15
35°
18°
16
33°
18°
17
34°
16°
18
37°
15°
19
34°
18°
20
33°
20°
21
39°
31°
22
40°
32°
23
44°
32°
24
43°
31°
25
46°
30°
26
46°
23°
27
42°
31°
28
Hist. Avg.
38°
25°
29
Hist. Avg.
38°
25°
30
Hist. Avg.
38°
24°
31
Hist. Avg.
38°
24°
1
Hist. Avg.
38°
24°
2
Hist. Avg.
38°
24°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Pittsburgh
Pittsburgh's December 2026 forecast shows daily high temperatures ranging from 33° to 59°, with overnight lows between 15° and 40°. The average high for December is 42° with an average low of 27°. 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.
