S
M
T
W
T
F
S
30
74°
50°
31
68°
46°
1
72°
53°
2
75°
53°
3
69°
50°
4
68°
49°
5
66°
44°
6
67°
46°
7
60°
45°
8
65°
46°
9
66°
47°
10
66°
46°
11
65°
46°
12
61°
44°
13
61°
43°
14
52°
43°
15
52°
42°
16
53°
42°
17
50°
41°
18
52°
42°
19
48°
41°
20
48°
35°
21
47°
36°
22
47°
38°
23
52°
37°
24
47°
40°
25
58°
40°
26
57°
39°
27
54°
38°
28
44°
38°
29
43°
37°
30
42°
37°
1
46°
36°
2
41°
35°
3
41°
34°
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 41° to 75°, with overnight lows between 34° and 53°. The average high for September is 56° with an average low of 42°. 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.
