S
M
T
W
T
F
S
30
79°
60°
31
82°
62°
1
83°
62°
2
83°
61°
3
82°
58°
4
77°
56°
5
77°
60°
6
82°
56°
7
75°
54°
8
81°
57°
9
82°
61°
10
82°
59°
11
83°
50°
12
76°
58°
13
76°
55°
14
78°
58°
15
76°
58°
16
79°
57°
17
81°
58°
18
80°
57°
19
78°
57°
20
79°
48°
21
77°
45°
22
69°
54°
23
69°
53°
24
71°
55°
25
75°
55°
26
78°
46°
27
76°
44°
28
67°
43°
29
66°
48°
30
66°
44°
1
64°
43°
2
65°
48°
3
67°
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 83°, with overnight lows between 43° and 62°. The average high for September is 76° 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.
