S
M
T
W
T
F
S
30
79°
56°
31
76°
61°
1
82°
64°
2
68°
63°
3
85°
66°
4
84°
62°
5
80°
56°
6
76°
53°
7
80°
51°
8
81°
57°
9
83°
68°
10
82°
58°
11
77°
49°
12
79°
58°
13
82°
61°
14
79°
60°
15
76°
59°
16
76°
56°
17
76°
53°
18
73°
52°
19
72°
57°
20
71°
40°
21
75°
55°
22
68°
55°
23
68°
54°
24
69°
54°
25
71°
53°
26
74°
51°
27
68°
48°
28
70°
51°
29
74°
53°
30
75°
53°
1
74°
52°
2
73°
53°
3
72°
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 68° to 83°, with overnight lows between 40° and 68°. The average high for September is 75° 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.
