S
M
T
W
T
F
S
30
89°
68°
31
88°
65°
1
88°
65°
2
83°
62°
3
84°
62°
4
87°
67°
5
88°
64°
6
87°
62°
7
82°
61°
8
83°
64°
9
84°
61°
10
84°
60°
11
83°
60°
12
83°
61°
13
82°
59°
14
81°
58°
15
82°
59°
16
81°
59°
17
85°
62°
18
84°
62°
19
82°
63°
20
84°
62°
21
81°
58°
22
78°
56°
23
Hist. Avg.
80°
57°
24
Hist. Avg.
80°
56°
25
Hist. Avg.
80°
56°
26
Hist. Avg.
79°
55°
27
Hist. Avg.
79°
55°
28
Hist. Avg.
79°
54°
29
Hist. Avg.
78°
54°
30
Hist. Avg.
78°
54°
1
Hist. Avg.
78°
53°
2
Hist. Avg.
77°
53°
3
Hist. Avg.
77°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lancaster
Lancaster's September 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 56° and 68°. The average high for September is 84° with an average low of 62°. 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.
