S
M
T
W
T
F
S
30
86°
67°
31
85°
66°
1
87°
68°
2
89°
68°
3
86°
64°
4
84°
63°
5
84°
62°
6
85°
62°
7
85°
62°
8
87°
65°
9
89°
67°
10
89°
63°
11
88°
62°
12
89°
65°
13
88°
62°
14
88°
64°
15
87°
66°
16
87°
65°
17
88°
64°
18
87°
65°
19
86°
64°
20
84°
63°
21
85°
64°
22
82°
64°
23
83°
59°
24
81°
62°
25
Hist. Avg.
84°
59°
26
Hist. Avg.
83°
59°
27
Hist. Avg.
83°
58°
28
Hist. Avg.
83°
58°
29
Hist. Avg.
82°
58°
30
Hist. Avg.
82°
57°
1
Hist. Avg.
82°
57°
2
Hist. Avg.
82°
56°
3
Hist. Avg.
81°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Allendale
Allendale's September 2026 forecast shows daily high temperatures ranging from 81° to 89°, with overnight lows between 59° and 68°. The average high for September is 86° with an average low of 64°. 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 Allendale. See also: October | November | December.
