S
M
T
W
T
F
S
30
84°
59°
31
82°
53°
1
78°
53°
2
76°
54°
3
76°
53°
4
77°
53°
5
76°
52°
6
75°
52°
7
75°
53°
8
76°
54°
9
75°
53°
10
73°
52°
11
75°
52°
12
76°
54°
13
74°
53°
14
76°
52°
15
72°
50°
16
73°
49°
17
71°
50°
18
72°
50°
19
75°
54°
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 71° to 84°, with overnight lows between 49° and 59°. The average high for September is 76° with an average low of 53°. 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.
