S
M
T
W
T
F
S
31
81°
56°
1
72°
56°
2
74°
58°
3
71°
52°
4
62°
50°
5
65°
47°
6
69°
49°
7
69°
50°
8
77°
53°
9
77°
54°
10
80°
54°
11
75°
52°
12
74°
50°
13
69°
50°
14
71°
47°
15
76°
52°
16
70°
54°
17
65°
51°
18
69°
52°
19
71°
51°
20
73°
51°
21
73°
54°
22
71°
51°
23
73°
51°
24
75°
53°
25
74°
52°
26
58°
46°
27
60°
45°
28
65°
42°
29
66°
43°
30
70°
46°
1
71°
44°
2
71°
48°
3
74°
50°
4
67°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Summerhaven
Summerhaven's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Summerhaven. See also: October | November | December.