S
M
T
W
T
F
S
30
85°
62°
31
84°
57°
1
81°
56°
2
78°
57°
3
77°
57°
4
78°
58°
5
77°
56°
6
76°
55°
7
76°
56°
8
77°
58°
9
76°
56°
10
74°
55°
11
76°
55°
12
77°
57°
13
75°
56°
14
76°
55°
15
74°
54°
16
75°
52°
17
74°
54°
18
74°
54°
19
73°
58°
20
75°
58°
21
76°
57°
22
Hist. Avg.
72°
54°
23
Hist. Avg.
72°
54°
24
Hist. Avg.
71°
54°
25
Hist. Avg.
71°
53°
26
Hist. Avg.
70°
53°
27
Hist. Avg.
70°
52°
28
Hist. Avg.
70°
52°
29
Hist. Avg.
69°
52°
30
Hist. Avg.
69°
51°
1
Hist. Avg.
69°
51°
2
Hist. Avg.
68°
50°
3
Hist. Avg.
68°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Greenhaven
Greenhaven's September 2026 forecast shows daily high temperatures ranging from 73° to 85°, with overnight lows between 52° and 62°. The average high for September is 77° with an average low of 56°. 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 Greenhaven. See also: October | November | December.
