S
M
T
W
T
F
S
30
91°
72°
31
88°
68°
1
88°
66°
2
88°
66°
3
88°
69°
4
91°
68°
5
91°
67°
6
89°
69°
7
88°
70°
8
91°
70°
9
91°
65°
10
88°
64°
11
87°
68°
12
89°
63°
13
85°
62°
14
83°
61°
15
84°
62°
16
83°
62°
17
88°
61°
18
89°
62°
19
89°
61°
20
88°
66°
21
88°
66°
22
Hist. Avg.
86°
63°
23
Hist. Avg.
85°
62°
24
Hist. Avg.
85°
62°
25
Hist. Avg.
85°
62°
26
Hist. Avg.
84°
61°
27
Hist. Avg.
84°
61°
28
Hist. Avg.
84°
61°
29
Hist. Avg.
84°
60°
30
Hist. Avg.
84°
60°
1
Hist. Avg.
83°
59°
2
Hist. Avg.
83°
59°
3
Hist. Avg.
83°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Prosper
Prosper's September 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 61° and 72°. The average high for September is 88° with an average low of 66°. 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 Prosper. See also: October | November | December.
