S
M
T
W
T
F
S
30
79°
56°
31
76°
61°
1
82°
64°
2
68°
63°
3
85°
66°
4
84°
59°
5
78°
59°
6
75°
50°
7
78°
53°
8
80°
60°
9
81°
66°
10
84°
58°
11
77°
54°
12
73°
53°
13
74°
58°
14
76°
54°
15
75°
57°
16
76°
56°
17
77°
45°
18
70°
48°
19
76°
54°
20
77°
54°
21
75°
52°
22
74°
52°
23
72°
54°
24
73°
51°
25
72°
50°
26
74°
54°
27
74°
53°
28
71°
48°
29
65°
46°
30
66°
46°
1
64°
43°
2
64°
46°
3
63°
48°
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 63° to 84°, with overnight lows between 43° and 66°. The average high for September is 74° with an average low of 53°. 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.
