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
75°
65°
14
73°
49°
15
72°
45°
16
77°
53°
17
81°
65°
18
80°
61°
19
72°
55°
20
65°
59°
21
70°
55°
22
68°
47°
23
68°
44°
24
71°
41°
25
73°
45°
26
64°
56°
27
65°
56°
28
62°
55°
29
70°
52°
30
73°
56°
1
79°
63°
2
83°
55°
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 62° to 83°, with overnight lows between 51° and 63°. The average high for September is 73° 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.
