S
M
T
W
T
F
S
30
76°
56°
31
79°
62°
1
80°
63°
2
80°
61°
3
76°
58°
4
75°
54°
5
74°
53°
6
74°
53°
7
76°
60°
8
79°
54°
9
73°
52°
10
73°
52°
11
75°
48°
12
71°
50°
13
71°
49°
14
69°
50°
15
71°
49°
16
72°
48°
17
71°
48°
18
74°
49°
19
70°
47°
20
70°
46°
21
68°
46°
22
69°
47°
23
71°
50°
24
75°
45°
25
75°
50°
26
74°
52°
27
69°
50°
28
66°
46°
29
72°
46°
30
70°
43°
1
65°
47°
2
72°
52°
3
71°
41°
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 80°, with overnight lows between 41° and 63°. The average high for September is 73° with an average low of 51°. 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.
