S
M
T
W
T
F
S
30
79°
56°
31
76°
61°
1
79°
65°
2
74°
67°
3
82°
64°
4
84°
58°
5
76°
55°
6
75°
57°
7
76°
58°
8
75°
53°
9
73°
54°
10
78°
56°
11
77°
59°
12
75°
56°
13
75°
55°
14
74°
53°
15
71°
52°
16
71°
57°
17
74°
50°
18
69°
48°
19
69°
48°
20
71°
51°
21
75°
56°
22
77°
56°
23
78°
55°
24
77°
54°
25
75°
52°
26
75°
53°
27
76°
54°
28
76°
53°
29
75°
50°
30
66°
45°
1
64°
45°
2
67°
50°
3
73°
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 84°, with overnight lows between 45° and 67°. The average high for September is 74° 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.
