S
M
T
W
T
F
S
30
95°
70°
31
95°
70°
1
97°
71°
2
98°
71°
3
98°
72°
4
94°
72°
5
90°
74°
6
97°
72°
7
95°
70°
8
92°
70°
9
93°
69°
10
92°
72°
11
86°
73°
12
89°
73°
13
93°
73°
14
95°
70°
15
95°
69°
16
92°
71°
17
89°
67°
18
93°
63°
19
96°
67°
20
91°
68°
21
92°
68°
22
91°
69°
23
89°
67°
24
75°
68°
25
80°
61°
26
85°
56°
27
87°
56°
28
86°
52°
29
88°
52°
30
91°
54°
1
89°
68°
2
87°
70°
3
86°
71°
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 86° to 89°, with overnight lows between 68° and 71°. The average high for September is 87° with an average low of 70°. 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.
