S
M
T
W
T
F
S
30
80°
59°
31
78°
61°
1
78°
61°
2
79°
60°
3
78°
55°
4
76°
56°
5
77°
58°
6
72°
53°
7
78°
59°
8
78°
58°
9
76°
59°
10
76°
59°
11
74°
56°
12
76°
58°
13
78°
55°
14
72°
51°
15
74°
52°
16
76°
56°
17
75°
57°
18
78°
51°
19
76°
50°
20
68°
47°
21
73°
55°
22
76°
54°
23
76°
52°
24
72°
49°
25
67°
48°
26
66°
46°
27
66°
44°
28
65°
45°
29
66°
45°
30
67°
46°
1
66°
48°
2
68°
44°
3
62°
45°
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 62° to 80°, with overnight lows between 44° and 61°. 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.
