S
M
T
W
T
F
S
30
79°
63°
31
75°
59°
1
75°
57°
2
73°
54°
3
73°
55°
4
81°
63°
5
72°
55°
6
68°
51°
7
75°
60°
8
82°
57°
9
67°
51°
10
68°
48°
11
70°
52°
12
69°
53°
13
65°
50°
14
65°
50°
15
67°
52°
16
69°
53°
17
65°
51°
18
68°
52°
19
66°
52°
20
69°
51°
21
67°
52°
22
66°
52°
23
69°
51°
24
70°
52°
25
70°
49°
26
69°
46°
27
64°
44°
28
62°
43°
29
62°
43°
30
63°
50°
1
61°
49°
2
64°
45°
3
65°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grimma
Grimma's September 2026 forecast shows daily high temperatures ranging from 61° to 82°, with overnight lows between 43° and 60°. The average high for September is 67° with an average low of 50°. 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 Grimma. See also: October | November | December.