S
M
T
W
T
F
S
30
70°
50°
31
70°
50°
1
71°
55°
2
72°
56°
3
73°
57°
4
70°
56°
5
74°
57°
6
77°
58°
7
77°
57°
8
75°
56°
9
70°
56°
10
72°
55°
11
71°
56°
12
70°
55°
13
67°
55°
14
67°
54°
15
68°
54°
16
67°
53°
17
69°
54°
18
69°
53°
19
71°
53°
20
71°
52°
21
76°
52°
22
76°
42°
23
68°
41°
24
65°
43°
25
68°
47°
26
65°
51°
27
71°
51°
28
71°
49°
29
72°
49°
30
73°
50°
1
72°
50°
2
72°
47°
3
70°
50°
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 65° to 77°, with overnight lows between 41° and 58°. The average high for September is 71° with an average low of 52°. 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.
