S
M
T
W
T
F
S
30
98°
75°
31
95°
73°
1
89°
79°
2
97°
78°
3
96°
80°
4
95°
77°
5
94°
75°
6
90°
74°
7
93°
76°
8
94°
74°
9
92°
73°
10
92°
73°
11
94°
74°
12
92°
73°
13
91°
72°
14
91°
74°
15
92°
73°
16
92°
72°
17
91°
73°
18
88°
74°
19
90°
71°
20
90°
73°
21
89°
72°
22
90°
71°
23
88°
72°
24
89°
72°
25
89°
71°
26
88°
71°
27
88°
70°
28
89°
71°
29
87°
71°
30
85°
68°
1
82°
62°
2
79°
62°
3
80°
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 79° to 94°, with overnight lows between 61° and 76°. The average high for September is 89° with an average low of 71°. 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.
