S
M
T
W
T
F
S
30
78°
54°
31
79°
53°
1
77°
54°
2
77°
55°
3
76°
55°
4
75°
56°
5
77°
55°
6
76°
54°
7
75°
52°
8
74°
51°
9
74°
52°
10
75°
57°
11
73°
51°
12
73°
50°
13
76°
49°
14
76°
56°
15
75°
56°
16
74°
53°
17
72°
48°
18
72°
48°
19
73°
49°
20
77°
54°
21
73°
49°
22
70°
51°
23
73°
52°
24
74°
53°
25
75°
52°
26
69°
44°
27
72°
46°
28
66°
45°
29
65°
44°
30
66°
44°
1
66°
43°
2
Hist. Avg.
69°
46°
3
Hist. Avg.
68°
46°
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 79°, with overnight lows between 43° and 57°. 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.
