S
M
T
W
T
F
S
30
86°
55°
31
77°
53°
1
77°
54°
2
78°
60°
3
77°
54°
4
78°
61°
5
82°
60°
6
83°
53°
7
80°
53°
8
75°
52°
9
75°
51°
10
74°
58°
11
77°
51°
12
76°
51°
13
74°
50°
14
73°
57°
15
77°
56°
16
79°
48°
17
80°
47°
18
70°
47°
19
69°
48°
20
70°
48°
21
69°
49°
22
67°
47°
23
67°
51°
24
69°
52°
25
69°
52°
26
75°
53°
27
74°
48°
28
75°
44°
29
67°
44°
30
67°
51°
1
66°
52°
2
69°
50°
3
71°
47°
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 66° to 86°, with overnight lows between 44° and 61°. The average high for September is 74° with an average low of 52°. 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.
