S
M
T
W
T
F
S
30
100°
75°
31
100°
75°
1
100°
75°
2
99°
76°
3
91°
76°
4
98°
75°
5
99°
75°
6
99°
75°
7
100°
75°
8
100°
77°
9
99°
80°
10
98°
76°
11
99°
74°
12
101°
74°
13
99°
78°
14
100°
76°
15
99°
78°
16
99°
78°
17
98°
77°
18
97°
73°
19
96°
69°
20
97°
75°
21
97°
71°
22
96°
71°
23
98°
75°
24
93°
73°
25
91°
66°
26
93°
64°
27
94°
70°
28
88°
70°
29
93°
72°
30
91°
76°
1
79°
68°
2
77°
69°
3
73°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Prosper
Prosper's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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.
