S
M
T
W
T
F
S
30
94°
72°
31
94°
69°
1
93°
70°
2
93°
72°
3
95°
71°
4
94°
72°
5
94°
71°
6
93°
68°
7
91°
64°
8
86°
64°
9
86°
65°
10
91°
67°
11
92°
69°
12
93°
67°
13
85°
68°
14
88°
69°
15
91°
65°
16
91°
61°
17
84°
60°
18
81°
60°
19
81°
59°
20
82°
58°
21
81°
59°
22
81°
58°
23
80°
59°
24
81°
64°
25
81°
64°
26
83°
65°
27
86°
64°
28
86°
64°
29
85°
62°
30
86°
59°
1
79°
61°
2
81°
54°
3
78°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Yorktown
Yorktown's September 2026 forecast shows daily high temperatures ranging from 78° to 95°, with overnight lows between 54° and 72°. The average high for September is 87° with an average low of 64°. 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 Yorktown. See also: October | November | December.
