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
79°
48°
8
80°
51°
9
81°
57°
10
87°
62°
11
79°
54°
12
79°
48°
13
75°
65°
14
73°
49°
15
72°
45°
16
77°
53°
17
81°
65°
18
80°
61°
19
72°
55°
20
65°
59°
21
70°
55°
22
67°
43°
23
68°
40°
24
70°
42°
25
71°
50°
26
67°
53°
27
67°
52°
28
69°
53°
29
72°
52°
30
73°
55°
1
74°
53°
2
72°
48°
3
65°
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 65° to 74°, with overnight lows between 40° and 55°. The average high for September is 70° with an average low of 49°. 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.
