S
M
T
W
T
F
S
30
81°
63°
31
87°
68°
1
85°
67°
2
85°
65°
3
83°
62°
4
76°
56°
5
77°
58°
6
72°
53°
7
78°
59°
8
78°
58°
9
76°
59°
10
76°
59°
11
73°
52°
12
74°
51°
13
75°
52°
14
77°
57°
15
79°
57°
16
79°
56°
17
77°
57°
18
79°
58°
19
79°
58°
20
74°
57°
21
77°
56°
22
78°
57°
23
77°
56°
24
78°
54°
25
71°
51°
26
67°
47°
27
69°
50°
28
74°
52°
29
75°
53°
30
75°
52°
1
74°
52°
2
74°
51°
3
73°
53°
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 67° to 87°, with overnight lows between 47° and 68°. The average high for September is 77° with an average low of 56°. 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.
