S
M
T
W
T
F
S
30
87°
67°
31
88°
66°
1
91°
68°
2
92°
69°
3
87°
70°
4
91°
69°
5
91°
70°
6
90°
69°
7
91°
68°
8
87°
70°
9
91°
69°
10
89°
69°
11
90°
68°
12
91°
68°
13
90°
62°
14
84°
62°
15
83°
61°
16
83°
61°
17
84°
64°
18
87°
67°
19
88°
65°
20
86°
66°
21
84°
65°
22
87°
66°
23
86°
60°
24
87°
58°
25
80°
57°
26
79°
57°
27
Hist. Avg.
80°
57°
28
Hist. Avg.
80°
56°
29
Hist. Avg.
80°
56°
30
Hist. Avg.
79°
56°
1
Hist. Avg.
79°
55°
2
Hist. Avg.
79°
55°
3
Hist. Avg.
78°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Thompson Grove
Thompson Grove's September 2026 forecast shows daily high temperatures ranging from 79° to 92°, with overnight lows between 57° and 70°. The average high for September is 87° with an average low of 65°. 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 Thompson Grove. See also: October | November | December.
