S
M
T
W
T
F
S
30
73°
52°
31
71°
54°
1
72°
51°
2
72°
51°
3
73°
55°
4
78°
57°
5
73°
58°
6
74°
54°
7
77°
53°
8
73°
57°
9
71°
50°
10
71°
51°
11
74°
55°
12
74°
54°
13
72°
47°
14
72°
57°
15
76°
57°
16
78°
54°
17
76°
45°
18
71°
43°
19
66°
43°
20
65°
45°
21
67°
45°
22
73°
54°
23
73°
53°
24
74°
45°
25
71°
41°
26
66°
42°
27
63°
42°
28
62°
40°
29
63°
42°
30
65°
49°
1
64°
43°
2
63°
39°
3
Hist. Avg.
66°
42°
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 62° to 78°, with overnight lows between 39° and 58°. The average high for September is 71° with an average low of 49°. 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.
