S
M
T
W
T
F
S
30
78°
57°
31
71°
64°
1
84°
68°
2
74°
65°
3
84°
65°
4
80°
66°
5
76°
60°
6
76°
55°
7
76°
51°
8
78°
52°
9
79°
58°
10
83°
64°
11
75°
56°
12
78°
51°
13
81°
65°
14
70°
49°
15
72°
44°
16
80°
55°
17
77°
68°
18
77°
57°
19
71°
55°
20
66°
59°
21
71°
58°
22
68°
51°
23
67°
46°
24
67°
41°
25
70°
48°
26
67°
49°
27
58°
50°
28
61°
50°
29
66°
50°
30
72°
54°
1
70°
52°
2
69°
49°
3
66°
47°
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 58° to 72°, with overnight lows between 41° and 54°. The average high for September is 67° 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.
