S
M
T
W
T
F
S
30
71°
51°
31
70°
50°
1
71°
51°
2
73°
54°
3
73°
55°
4
71°
50°
5
70°
49°
6
68°
50°
7
70°
52°
8
72°
50°
9
72°
55°
10
73°
54°
11
72°
55°
12
72°
50°
13
69°
48°
14
67°
52°
15
66°
53°
16
67°
54°
17
66°
54°
18
70°
53°
19
69°
54°
20
69°
54°
21
70°
50°
22
69°
47°
23
64°
46°
24
64°
46°
25
65°
49°
26
66°
49°
27
66°
48°
28
62°
53°
29
66°
52°
30
67°
51°
1
66°
52°
2
67°
51°
3
66°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Herne
Herne's September 2026 forecast shows daily high temperatures ranging from 62° to 73°, with overnight lows between 46° and 55°. The average high for September is 69° with an average low of 51°. 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 Herne. See also: October | November | December.
