S
M
T
W
T
F
S
30
70°
59°
31
70°
57°
1
68°
55°
2
70°
55°
3
68°
59°
4
64°
57°
5
63°
59°
6
67°
57°
7
75°
61°
8
66°
55°
9
64°
55°
10
63°
54°
11
64°
56°
12
64°
55°
13
65°
54°
14
64°
56°
15
65°
55°
16
65°
57°
17
64°
55°
18
65°
52°
19
66°
52°
20
64°
53°
21
65°
53°
22
65°
54°
23
66°
54°
24
66°
53°
25
65°
52°
26
62°
51°
27
61°
48°
28
60°
47°
29
59°
46°
30
58°
51°
1
62°
50°
2
61°
47°
3
61°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Heide
Heide's September 2026 forecast shows daily high temperatures ranging from 58° to 75°, with overnight lows between 46° and 61°. The average high for September is 64° with an average low of 53°. 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 Heide. See also: October | November | December.