S
M
T
W
T
F
S
30
98°
77°
31
97°
75°
1
99°
67°
2
99°
67°
3
97°
70°
4
97°
69°
5
100°
68°
6
99°
71°
7
92°
71°
8
100°
74°
9
82°
72°
10
87°
61°
11
87°
58°
12
77°
59°
13
80°
57°
14
96°
58°
15
87°
64°
16
87°
64°
17
92°
68°
18
98°
75°
19
96°
70°
20
70°
65°
21
71°
58°
22
72°
58°
23
75°
59°
24
76°
58°
25
66°
60°
26
74°
64°
27
79°
63°
28
79°
63°
29
81°
60°
30
75°
68°
1
72°
56°
2
71°
48°
3
77°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lancaster
Lancaster's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Lancaster. See also: October | November | December.
