S
M
T
W
T
F
S
30
78°
68°
31
90°
69°
1
94°
71°
2
95°
72°
3
95°
73°
4
96°
72°
5
85°
70°
6
85°
65°
7
83°
58°
8
89°
61°
9
80°
68°
10
80°
58°
11
N/A
12
82°
54°
13
70°
51°
14
72°
65°
15
77°
64°
16
75°
62°
17
76°
55°
18
74°
55°
19
66°
50°
20
72°
48°
21
73°
52°
22
74°
54°
23
76°
51°
24
72°
37°
25
77°
53°
26
78°
54°
27
77°
53°
28
77°
53°
29
74°
52°
30
75°
49°
1
71°
46°
2
69°
50°
3
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Thomson
Thomson's September 2026 forecast shows daily high temperatures ranging from 66° to 82°, with overnight lows between 37° and 65°. The average high for September is 74° with an average low of 53°. 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.
