S
M
T
W
T
F
S
30
60°
46°
31
59°
48°
1
58°
45°
2
58°
47°
3
59°
48°
4
60°
47°
5
58°
46°
6
57°
44°
7
56°
48°
8
56°
47°
9
56°
40°
10
56°
43°
11
57°
47°
12
58°
48°
13
55°
48°
14
59°
47°
15
60°
45°
16
59°
43°
17
58°
44°
18
54°
40°
19
58°
44°
20
58°
44°
21
52°
40°
22
56°
43°
23
Hist. Avg.
54°
40°
24
Hist. Avg.
53°
40°
25
Hist. Avg.
53°
39°
26
Hist. Avg.
52°
39°
27
Hist. Avg.
52°
38°
28
Hist. Avg.
51°
38°
29
Hist. Avg.
51°
38°
30
Hist. Avg.
50°
37°
1
Hist. Avg.
50°
37°
2
Hist. Avg.
49°
36°
3
Hist. Avg.
49°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Thompson
Thompson's September 2026 forecast shows daily high temperatures ranging from 52° to 60°, with overnight lows between 40° and 48°. The average high for September is 57° with an average low of 45°. 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.
