S
M
T
W
T
F
S
30
102°
71°
31
101°
74°
1
98°
73°
2
95°
72°
3
92°
72°
4
95°
73°
5
95°
72°
6
96°
75°
7
97°
74°
8
99°
73°
9
98°
74°
10
98°
75°
11
89°
71°
12
91°
69°
13
92°
70°
14
88°
65°
15
91°
69°
16
91°
68°
17
90°
69°
18
91°
69°
19
91°
68°
20
90°
69°
21
89°
68°
22
88°
68°
23
89°
67°
24
89°
67°
25
88°
66°
26
88°
67°
27
89°
66°
28
89°
65°
29
88°
64°
30
89°
65°
1
89°
65°
2
88°
64°
3
87°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Pittsburg
Pittsburg's September 2026 forecast shows daily high temperatures ranging from 87° to 99°, with overnight lows between 64° and 75°. The average high for September is 91° with an average low of 69°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Pittsburg. See also: October | November | December.
