S
M
T
W
T
F
S
30
80°
60°
31
83°
62°
1
81°
62°
2
83°
61°
3
83°
62°
4
82°
61°
5
82°
60°
6
81°
60°
7
81°
61°
8
82°
61°
9
82°
60°
10
81°
59°
11
80°
59°
12
81°
58°
13
81°
60°
14
80°
59°
15
79°
58°
16
79°
57°
17
75°
56°
18
75°
53°
19
69°
51°
20
74°
55°
21
77°
50°
22
74°
46°
23
66°
45°
24
67°
50°
25
66°
52°
26
74°
53°
27
76°
50°
28
72°
45°
29
69°
52°
30
68°
45°
1
73°
42°
2
64°
41°
3
62°
42°
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 41° and 62°. The average high for September is 76° 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.
