S
M
T
W
T
F
S
30
95°
63°
31
94°
65°
1
95°
67°
2
95°
66°
3
94°
66°
4
94°
67°
5
93°
68°
6
95°
68°
7
94°
67°
8
93°
67°
9
94°
66°
10
96°
67°
11
95°
66°
12
95°
67°
13
94°
67°
14
95°
58°
15
94°
56°
16
84°
57°
17
83°
62°
18
84°
63°
19
85°
57°
20
84°
56°
21
83°
57°
22
84°
62°
23
87°
62°
24
85°
61°
25
87°
61°
26
89°
60°
27
88°
59°
28
88°
59°
29
86°
60°
30
86°
59°
1
84°
57°
2
83°
58°
3
80°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grape Creek
Grape Creek's September 2026 forecast shows daily high temperatures ranging from 80° to 96°, with overnight lows between 52° and 68°. The average high for September is 90° with an average low of 62°. 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 Grape Creek. See also: October | November | December.