S
M
T
W
T
F
S
30
87°
71°
31
93°
68°
1
96°
71°
2
99°
73°
3
99°
73°
4
97°
73°
5
97°
70°
6
91°
68°
7
88°
68°
8
90°
64°
9
91°
63°
10
95°
68°
11
97°
72°
12
90°
70°
13
93°
73°
14
95°
68°
15
88°
72°
16
90°
66°
17
93°
61°
18
99°
70°
19
91°
72°
20
93°
68°
21
95°
70°
22
90°
70°
23
68°
61°
24
61°
57°
25
75°
48°
26
81°
45°
27
82°
48°
28
82°
50°
29
84°
55°
30
88°
57°
1
88°
59°
2
91°
59°
3
84°
64°
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.
