S
M
T
W
T
F
S
30
80°
55°
31
79°
54°
1
78°
55°
2
78°
56°
3
79°
56°
4
76°
57°
5
78°
55°
6
77°
56°
7
76°
54°
8
77°
53°
9
75°
53°
10
77°
59°
11
75°
53°
12
75°
52°
13
78°
51°
14
78°
58°
15
79°
58°
16
75°
57°
17
74°
50°
18
78°
50°
19
79°
53°
20
79°
56°
21
78°
51°
22
73°
53°
23
76°
54°
24
74°
52°
25
73°
53°
26
70°
47°
27
74°
47°
28
68°
46°
29
66°
47°
30
66°
46°
1
Hist. Avg.
68°
46°
2
Hist. Avg.
68°
46°
3
Hist. Avg.
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Poestenkill
Poestenkill's September 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 46° and 59°. The average high for September is 76° 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 Poestenkill. See also: October | November | December.
