S
M
T
W
T
F
S
30
82°
61°
31
N/A
1
91°
69°
2
94°
70°
3
93°
68°
4
84°
68°
5
78°
61°
6
79°
60°
7
80°
58°
8
76°
59°
9
81°
62°
10
81°
59°
11
78°
56°
12
76°
56°
13
74°
57°
14
75°
54°
15
79°
60°
16
77°
59°
17
78°
57°
18
74°
54°
19
77°
57°
20
79°
59°
21
79°
58°
22
78°
58°
23
80°
57°
24
79°
57°
25
79°
56°
26
77°
55°
27
78°
56°
28
77°
56°
29
76°
55°
30
76°
53°
1
75°
53°
2
75°
52°
3
74°
53°
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 74° to 94°, with overnight lows between 52° and 70°. The average high for September is 79° with an average low of 58°. 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.
