S
M
T
W
T
F
S
30
80°
58°
31
78°
59°
1
80°
58°
2
82°
62°
3
75°
59°
4
76°
56°
5
74°
54°
6
72°
53°
7
73°
52°
8
73°
54°
9
74°
54°
10
74°
51°
11
72°
54°
12
72°
56°
13
74°
53°
14
76°
58°
15
79°
58°
16
74°
56°
17
73°
57°
18
78°
58°
19
77°
57°
20
77°
57°
21
74°
56°
22
70°
55°
23
68°
54°
24
68°
54°
25
69°
55°
26
75°
54°
27
75°
44°
28
64°
43°
29
64°
43°
30
65°
52°
1
73°
49°
2
67°
41°
3
67°
38°
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 64° to 82°, with overnight lows between 38° and 62°. The average high for September is 73° 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 Poughkeepsie. See also: October | November | December.
