S
M
T
W
T
F
S
30
79°
56°
31
76°
61°
1
82°
64°
2
68°
63°
3
85°
66°
4
84°
62°
5
80°
56°
6
76°
53°
7
79°
48°
8
80°
51°
9
81°
57°
10
87°
66°
11
78°
50°
12
79°
65°
13
83°
61°
14
75°
47°
15
74°
61°
16
84°
63°
17
81°
58°
18
78°
54°
19
73°
49°
20
69°
56°
21
73°
51°
22
70°
52°
23
71°
39°
24
69°
54°
25
66°
45°
26
66°
46°
27
68°
53°
28
74°
49°
29
66°
45°
30
67°
51°
1
68°
50°
2
64°
46°
3
69°
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 39° and 65°. The average high for September is 72° 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.
