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
86°
72°
8
90°
68°
9
91°
64°
10
93°
73°
11
94°
72°
12
87°
70°
13
90°
70°
14
93°
72°
15
90°
68°
16
88°
65°
17
88°
67°
18
89°
68°
19
85°
66°
20
80°
62°
21
78°
57°
22
81°
59°
23
83°
63°
24
82°
62°
25
86°
66°
26
85°
64°
27
84°
62°
28
86°
65°
29
87°
65°
30
87°
64°
1
84°
65°
2
86°
64°
3
85°
64°
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 78° to 94°, with overnight lows between 57° and 72°. The average high for September is 86° 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 Thomson. See also: October | November | December.
