S
M
T
W
T
F
S
30
77°
58°
31
75°
60°
1
65°
58°
2
71°
58°
3
78°
59°
4
78°
63°
5
70°
58°
6
68°
54°
7
75°
53°
8
75°
58°
9
75°
58°
10
81°
60°
11
72°
56°
12
73°
56°
13
68°
61°
14
68°
54°
15
68°
50°
16
75°
51°
17
74°
66°
18
75°
56°
19
63°
49°
20
58°
52°
21
64°
50°
22
62°
47°
23
61°
46°
24
63°
44°
25
64°
53°
26
59°
52°
27
60°
54°
28
60°
55°
29
68°
53°
30
71°
52°
1
73°
55°
2
74°
53°
3
69°
51°
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 59° to 74°, with overnight lows between 51° and 55°. The average high for September is 66° with an average low of 53°. 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.
