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
83°
54°
13
72°
46°
14
72°
65°
15
77°
64°
16
75°
62°
17
76°
55°
18
74°
55°
19
66°
50°
20
72°
48°
21
71°
49°
22
72°
51°
23
72°
51°
24
76°
53°
25
81°
50°
26
78°
54°
27
77°
53°
28
75°
53°
29
72°
53°
30
73°
52°
1
75°
50°
2
74°
50°
3
72°
49°
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 83°, with overnight lows between 46° 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.
