S
M
T
W
T
F
S
30
95°
70°
31
95°
70°
1
97°
71°
2
98°
71°
3
98°
72°
4
94°
72°
5
90°
74°
6
94°
71°
7
91°
74°
8
88°
71°
9
88°
72°
10
88°
71°
11
88°
69°
12
89°
69°
13
89°
68°
14
91°
67°
15
89°
68°
16
87°
67°
17
89°
65°
18
88°
64°
19
85°
63°
20
83°
66°
21
88°
67°
22
87°
65°
23
87°
65°
24
86°
64°
25
87°
65°
26
87°
65°
27
86°
64°
28
86°
65°
29
85°
65°
30
86°
64°
1
86°
64°
2
85°
61°
3
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Thompson
Thompson's September 2026 forecast shows daily high temperatures ranging from 76° to 94°, with overnight lows between 58° and 74°. The average high for September is 87° with an average low of 66°. 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. See also: October | November | December.
