S
M
T
W
T
F
S
30
78°
61°
31
83°
63°
1
84°
57°
2
82°
56°
3
77°
55°
4
78°
57°
5
77°
63°
6
82°
62°
7
84°
58°
8
76°
61°
9
75°
61°
10
79°
60°
11
79°
59°
12
78°
59°
13
77°
58°
14
74°
53°
15
74°
53°
16
73°
52°
17
73°
53°
18
74°
58°
19
77°
58°
20
76°
59°
21
78°
55°
22
74°
50°
23
71°
56°
24
70°
57°
25
76°
51°
26
75°
48°
27
Hist. Avg.
74°
56°
28
Hist. Avg.
74°
55°
29
Hist. Avg.
74°
55°
30
Hist. Avg.
73°
54°
1
Hist. Avg.
73°
54°
2
Hist. Avg.
72°
54°
3
Hist. Avg.
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Tappan
Tappan's September 2026 forecast shows daily high temperatures ranging from 70° to 84°, with overnight lows between 48° and 63°. The average high for September is 77° with an average low of 57°. 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 Tappan. See also: October | November | December.
