S
M
T
W
T
F
S
30
84°
65°
31
79°
61°
1
71°
59°
2
76°
60°
3
74°
59°
4
78°
60°
5
82°
60°
6
82°
62°
7
74°
66°
8
76°
55°
9
71°
52°
10
80°
56°
11
71°
48°
12
64°
43°
13
60°
45°
14
62°
47°
15
66°
49°
16
67°
48°
17
63°
45°
18
62°
45°
19
60°
44°
20
63°
41°
21
68°
47°
22
66°
48°
23
66°
47°
24
60°
46°
25
64°
45°
26
67°
46°
27
67°
47°
28
66°
45°
29
64°
44°
30
60°
43°
1
59°
42°
2
53°
37°
3
51°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Grunthal
Grunthal's September 2026 forecast shows daily high temperatures ranging from 51° to 80°, with overnight lows between 36° and 66°. The average high for September is 65° with an average low of 47°. 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 Grunthal. See also: October | November | December.
