S
M
T
W
T
F
S
30
78°
56°
31
80°
61°
1
82°
58°
2
77°
55°
3
79°
54°
4
77°
54°
5
78°
60°
6
76°
60°
7
80°
58°
8
80°
58°
9
74°
59°
10
76°
58°
11
Hist. Avg.
77°
54°
12
Hist. Avg.
77°
54°
13
Hist. Avg.
76°
54°
14
Hist. Avg.
76°
53°
15
Hist. Avg.
76°
53°
16
Hist. Avg.
75°
52°
17
Hist. Avg.
75°
52°
18
Hist. Avg.
75°
52°
19
Hist. Avg.
74°
51°
20
Hist. Avg.
74°
51°
21
Hist. Avg.
73°
50°
22
Hist. Avg.
73°
50°
23
Hist. Avg.
72°
50°
24
Hist. Avg.
72°
49°
25
Hist. Avg.
72°
49°
26
Hist. Avg.
71°
48°
27
Hist. Avg.
71°
48°
28
Hist. Avg.
70°
48°
29
Hist. Avg.
70°
47°
30
Hist. Avg.
70°
47°
1
Hist. Avg.
69°
46°
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
*Temporarily Unavailable
September Weather in Poughkeepsie
Poughkeepsie's September 2026 forecast shows daily high temperatures ranging from 74° to 82°, with overnight lows between 54° and 61°. The average high for September is 78° with an average low of 58°. 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.
