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°
62°
11
79°
54°
12
79°
48°
13
79°
64°
14
74°
45°
15
74°
54°
16
81°
61°
17
80°
64°
18
77°
57°
19
72°
60°
20
69°
51°
21
71°
52°
22
66°
52°
23
68°
54°
24
69°
50°
25
72°
51°
26
71°
60°
27
68°
53°
28
74°
53°
29
74°
50°
30
67°
46°
1
66°
48°
2
69°
51°
3
72°
48°
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 81°, with overnight lows between 45° and 64°. The average high for September is 72° with an average low of 54°. 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.
