S
M
T
W
T
F
S
30
97°
69°
31
96°
69°
1
97°
68°
2
96°
69°
3
96°
68°
4
95°
69°
5
97°
69°
6
97°
68°
7
96°
69°
8
96°
70°
9
95°
68°
10
94°
68°
11
91°
68°
12
94°
68°
13
97°
67°
14
95°
68°
15
95°
67°
16
94°
66°
17
94°
64°
18
91°
65°
19
86°
63°
20
84°
64°
21
88°
65°
22
92°
64°
23
84°
64°
24
84°
62°
25
87°
64°
26
87°
64°
27
89°
63°
28
89°
63°
29
88°
64°
30
87°
62°
1
80°
60°
2
80°
62°
3
87°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fresno
Fresno's September 2026 forecast shows daily high temperatures ranging from 80° to 97°, with overnight lows between 60° and 70°. The average high for September is 91° with an average low of 66°. 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 Fresno. See also: October | November | December.
