S
M
T
W
T
F
S
30
103°
73°
31
102°
72°
1
102°
73°
2
102°
76°
3
100°
74°
4
100°
73°
5
104°
72°
6
103°
71°
7
99°
72°
8
100°
73°
9
100°
70°
10
87°
62°
11
89°
68°
12
91°
71°
13
86°
67°
14
84°
59°
15
83°
61°
16
87°
63°
17
83°
62°
18
85°
60°
19
75°
59°
20
80°
65°
21
86°
65°
22
85°
65°
23
86°
64°
24
86°
65°
25
83°
65°
26
82°
64°
27
82°
63°
28
83°
64°
29
83°
63°
30
79°
56°
1
71°
51°
2
69°
49°
3
68°
48°
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 68° to 103°, with overnight lows between 48° and 73°. The average high for September is 85° with an average low of 63°. 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.
