S
M
T
W
T
F
S
30
82°
64°
31
80°
65°
1
75°
66°
2
77°
66°
3
84°
62°
4
78°
60°
5
77°
58°
6
77°
59°
7
78°
58°
8
79°
61°
9
80°
62°
10
79°
57°
11
80°
52°
12
74°
51°
13
75°
52°
14
77°
53°
15
71°
52°
16
71°
57°
17
74°
50°
18
69°
48°
19
69°
48°
20
71°
51°
21
75°
56°
22
77°
56°
23
78°
55°
24
77°
54°
25
75°
52°
26
75°
53°
27
76°
54°
28
76°
53°
29
75°
50°
30
66°
45°
1
64°
45°
2
67°
50°
3
73°
51°
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 84°, with overnight lows between 45° and 66°. The average high for September is 75° with an average low of 55°. 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.
