S
M
T
W
T
F
S
30
90°
58°
31
82°
58°
1
77°
58°
2
78°
60°
3
70°
56°
4
76°
53°
5
80°
58°
6
83°
56°
7
86°
60°
8
92°
61°
9
94°
65°
10
91°
61°
11
87°
60°
12
87°
61°
13
88°
61°
14
90°
62°
15
89°
57°
16
86°
60°
17
91°
60°
18
84°
61°
19
91°
61°
20
91°
60°
21
90°
60°
22
91°
59°
23
85°
59°
24
87°
58°
25
89°
59°
26
90°
60°
27
91°
60°
28
90°
59°
29
90°
60°
30
89°
58°
1
90°
59°
2
88°
58°
3
82°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Gridley
Gridley's September 2026 forecast shows daily high temperatures ranging from 70° to 94°, with overnight lows between 53° and 65°. The average high for September is 87° with an average low of 59°. 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 Gridley. See also: October | November | December.
