S
M
T
W
T
F
S
30
91°
70°
31
90°
71°
1
94°
69°
2
93°
70°
3
89°
69°
4
88°
66°
5
88°
64°
6
89°
63°
7
91°
69°
8
93°
70°
9
93°
70°
10
92°
69°
11
91°
68°
12
90°
67°
13
91°
66°
14
90°
67°
15
91°
67°
16
85°
62°
17
86°
61°
18
83°
62°
19
Hist. Avg.
86°
61°
20
Hist. Avg.
86°
60°
21
Hist. Avg.
85°
60°
22
Hist. Avg.
85°
60°
23
Hist. Avg.
85°
59°
24
Hist. Avg.
84°
58°
25
Hist. Avg.
84°
58°
26
Hist. Avg.
84°
58°
27
Hist. Avg.
83°
57°
28
Hist. Avg.
83°
57°
29
Hist. Avg.
83°
56°
30
Hist. Avg.
82°
56°
1
Hist. Avg.
82°
55°
2
Hist. Avg.
82°
55°
3
Hist. Avg.
81°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Pittsburg
Pittsburg's September 2026 forecast shows daily high temperatures ranging from 83° to 94°, with overnight lows between 61° and 71°. The average high for September is 90° with an average low of 67°. 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.
