S
M
T
W
T
F
S
30
93°
69°
31
92°
70°
1
92°
68°
2
91°
68°
3
90°
69°
4
90°
65°
5
89°
68°
6
91°
69°
7
90°
68°
8
89°
67°
9
89°
68°
10
90°
68°
11
89°
67°
12
88°
66°
13
85°
66°
14
87°
66°
15
84°
66°
16
84°
65°
17
85°
64°
18
84°
63°
19
83°
64°
20
83°
59°
21
81°
58°
22
83°
60°
23
83°
63°
24
85°
62°
25
86°
63°
26
85°
62°
27
86°
63°
28
80°
61°
29
81°
58°
30
83°
59°
1
Hist. Avg.
83°
62°
2
Hist. Avg.
83°
61°
3
Hist. Avg.
82°
61°
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 80° to 93°, with overnight lows between 58° 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. See also: October | November | December.
