S
M
T
W
T
F
S
30
87°
68°
31
88°
66°
1
92°
66°
2
93°
67°
3
95°
68°
4
92°
69°
5
93°
68°
6
91°
68°
7
84°
64°
8
86°
62°
9
86°
65°
10
82°
66°
11
79°
63°
12
79°
60°
13
83°
62°
14
82°
61°
15
79°
58°
16
77°
58°
17
79°
60°
18
77°
58°
19
75°
57°
20
74°
53°
21
81°
58°
22
77°
58°
23
79°
57°
24
79°
59°
25
78°
58°
26
79°
58°
27
79°
57°
28
78°
58°
29
79°
58°
30
78°
57°
1
78°
56°
2
74°
49°
3
66°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grimsley
Grimsley's September 2026 forecast shows daily high temperatures ranging from 66° to 86°, with overnight lows between 45° and 66°. The average high for September is 79° with an average low of 58°. 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 Grimsley. See also: October | November | December.
