S
M
T
W
T
F
S
30
87°
63°
31
86°
60°
1
84°
61°
2
85°
59°
3
84°
58°
4
79°
60°
5
86°
59°
6
85°
53°
7
Hist. Avg.
81°
58°
8
Hist. Avg.
81°
58°
9
Hist. Avg.
80°
58°
10
Hist. Avg.
80°
58°
11
Hist. Avg.
80°
57°
12
Hist. Avg.
80°
57°
13
Hist. Avg.
79°
57°
14
Hist. Avg.
79°
56°
15
Hist. Avg.
79°
56°
16
Hist. Avg.
79°
56°
17
Hist. Avg.
78°
55°
18
Hist. Avg.
78°
55°
19
Hist. Avg.
78°
55°
20
Hist. Avg.
77°
54°
21
Hist. Avg.
77°
54°
22
Hist. Avg.
77°
54°
23
Hist. Avg.
76°
53°
24
Hist. Avg.
76°
53°
25
Hist. Avg.
76°
52°
26
Hist. Avg.
75°
52°
27
Hist. Avg.
75°
52°
28
Hist. Avg.
75°
51°
29
Hist. Avg.
74°
51°
30
Hist. Avg.
74°
51°
1
Hist. Avg.
73°
50°
2
Hist. Avg.
73°
50°
3
Hist. Avg.
73°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Gridley
Gridley's September 2026 forecast shows daily high temperatures ranging from 79° to 87°, with overnight lows between 53° and 63°. The average high for September is 85° 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.
