S
M
T
W
T
F
S
30
91°
71°
31
91°
70°
1
90°
70°
2
89°
69°
3
87°
69°
4
84°
68°
5
84°
69°
6
88°
69°
7
90°
66°
8
90°
65°
9
88°
66°
10
89°
65°
11
89°
67°
12
88°
66°
13
88°
66°
14
84°
65°
15
88°
66°
16
88°
60°
17
81°
59°
18
81°
59°
19
82°
58°
20
83°
62°
21
86°
64°
22
86°
64°
23
82°
63°
24
81°
61°
25
85°
63°
26
85°
62°
27
83°
62°
28
81°
61°
29
85°
58°
30
83°
59°
1
79°
60°
2
81°
59°
3
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Prosperity
Prosperity's September 2026 forecast shows daily high temperatures ranging from 76° to 91°, with overnight lows between 58° and 71°. The average high for September is 85° 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 Prosperity. See also: October | November | December.
