S
M
T
W
T
F
S
30
82°
61°
31
82°
61°
1
83°
62°
2
83°
61°
3
82°
54°
4
77°
51°
5
74°
53°
6
74°
59°
7
79°
59°
8
80°
58°
9
81°
59°
10
74°
58°
11
79°
57°
12
79°
58°
13
78°
58°
14
78°
57°
15
79°
57°
16
79°
49°
17
75°
56°
18
76°
52°
19
73°
49°
20
72°
47°
21
67°
45°
22
66°
52°
23
68°
49°
24
67°
46°
25
65°
44°
26
65°
44°
27
67°
50°
28
72°
51°
29
73°
48°
30
67°
46°
1
63°
49°
2
64°
41°
3
64°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Slingerlands
Slingerlands's September 2026 forecast shows daily high temperatures ranging from 63° to 83°, with overnight lows between 41° and 62°. The average high for September is 74° 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 Slingerlands. See also: October | November | December.