S
M
T
W
T
F
S
30
92°
71°
31
93°
70°
1
96°
71°
2
99°
73°
3
97°
73°
4
97°
72°
5
100°
73°
6
95°
72°
7
87°
67°
8
90°
67°
9
87°
71°
10
87°
70°
11
89°
71°
12
89°
69°
13
91°
70°
14
89°
69°
15
88°
68°
16
84°
66°
17
86°
65°
18
87°
67°
19
86°
66°
20
84°
63°
21
88°
67°
22
88°
66°
23
87°
67°
24
87°
66°
25
86°
66°
26
88°
66°
27
88°
66°
28
87°
66°
29
86°
65°
30
86°
65°
1
85°
64°
2
86°
64°
3
83°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Thomson
Thomson's September 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 63° and 71°. The average high for September is 87° with an average low of 67°. 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 Thomson. See also: October | November | December.
