S
M
T
W
T
F
S
30
76°
55°
31
75°
54°
1
76°
57°
2
76°
58°
3
77°
57°
4
76°
61°
5
75°
61°
6
78°
62°
7
82°
61°
8
81°
60°
9
78°
59°
10
78°
60°
11
77°
60°
12
75°
59°
13
77°
59°
14
72°
58°
15
71°
57°
16
71°
56°
17
72°
54°
18
74°
56°
19
74°
56°
20
73°
53°
21
81°
55°
22
80°
48°
23
76°
46°
24
70°
45°
25
69°
52°
26
68°
54°
27
74°
54°
28
75°
52°
29
76°
49°
30
76°
51°
1
74°
52°
2
74°
51°
3
75°
52°
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 68° to 82°, with overnight lows between 45° and 62°. The average high for September is 75° 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.
