S
M
T
W
T
F
S
30
82°
58°
31
77°
54°
1
75°
54°
2
74°
55°
3
74°
53°
4
75°
55°
5
76°
61°
6
76°
61°
7
79°
60°
8
81°
59°
9
81°
59°
10
77°
60°
11
82°
59°
12
81°
58°
13
81°
60°
14
77°
56°
15
81°
47°
16
72°
47°
17
71°
48°
18
71°
48°
19
72°
51°
20
70°
55°
21
75°
54°
22
69°
53°
23
76°
55°
24
77°
54°
25
76°
55°
26
77°
55°
27
77°
49°
28
76°
42°
29
74°
42°
30
65°
47°
1
64°
43°
2
66°
49°
3
64°
46°
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 42° and 61°. The average high for September is 75° 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.
