S
M
T
W
T
F
S
30
90°
70°
31
90°
70°
1
89°
69°
2
91°
70°
3
91°
70°
4
88°
69°
5
89°
68°
6
89°
68°
7
90°
67°
8
91°
69°
9
91°
69°
10
90°
68°
11
90°
69°
12
89°
68°
13
89°
68°
14
87°
65°
15
90°
66°
16
89°
64°
17
88°
65°
18
88°
60°
19
85°
56°
20
79°
57°
21
81°
56°
22
82°
56°
23
84°
60°
24
85°
62°
25
85°
58°
26
81°
57°
27
78°
60°
28
81°
60°
29
81°
59°
30
82°
58°
1
83°
59°
2
82°
58°
3
82°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Hopper
Hopper's September 2026 forecast shows daily high temperatures ranging from 78° to 91°, with overnight lows between 56° and 70°. The average high for September is 86° with an average low of 64°. 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 Hopper. See also: October | November | December.