S
M
T
W
T
F
S
30
75°
53°
31
75°
53°
1
76°
57°
2
76°
62°
3
77°
62°
4
83°
61°
5
83°
60°
6
81°
53°
7
77°
52°
8
75°
52°
9
75°
51°
10
73°
51°
11
74°
52°
12
72°
51°
13
77°
56°
14
79°
57°
15
77°
56°
16
71°
54°
17
72°
55°
18
73°
54°
19
74°
48°
20
72°
50°
21
73°
47°
22
75°
46°
23
69°
46°
24
69°
47°
25
70°
52°
26
69°
45°
27
68°
51°
28
69°
50°
29
66°
43°
30
66°
45°
1
67°
51°
2
72°
46°
3
70°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Poughkeepsie
Poughkeepsie's September 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 43° and 62°. The average high for September is 73° with an average low of 52°. 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 Poughkeepsie. See also: October | November | December.
