S
M
T
W
T
F
S
30
80°
60°
31
75°
54°
1
75°
54°
2
76°
55°
3
75°
59°
4
75°
59°
5
76°
57°
6
76°
55°
7
78°
56°
8
80°
57°
9
80°
57°
10
81°
59°
11
81°
59°
12
80°
58°
13
81°
59°
14
77°
59°
15
74°
57°
16
71°
52°
17
70°
49°
18
71°
48°
19
77°
55°
20
74°
49°
21
69°
47°
22
68°
48°
23
76°
51°
24
77°
54°
25
78°
54°
26
76°
53°
27
74°
54°
28
71°
52°
29
68°
53°
30
68°
50°
1
67°
51°
2
66°
44°
3
65°
39°
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 81°, with overnight lows between 39° and 60°. 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.
