S
M
T
W
T
F
S
26
62°
46°
27
77°
43°
28
74°
55°
29
62°
46°
30
57°
37°
1
55°
34°
2
51°
30°
3
62°
29°
4
73°
50°
5
72°
58°
6
61°
40°
7
60°
35°
8
68°
38°
9
72°
52°
10
68°
45°
11
66°
39°
12
71°
44°
13
70°
48°
14
64°
41°
15
71°
36°
16
76°
49°
17
85°
59°
18
90°
66°
19
87°
66°
20
69°
44°
21
65°
55°
22
64°
64°
23
76°
60°
24
78°
62°
25
77°
65°
26
78°
63°
27
78°
62°
28
77°
59°
29
79°
57°
30
80°
57°
31
81°
66°
1
78°
60°
2
79°
60°
3
79°
58°
4
73°
56°
5
74°
54°
6
76°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lancaster
Lancaster's May 2026 forecast shows daily high temperatures ranging from 64° to 90°, with overnight lows between 44° and 66°. The average high for May is 77° with an average low of 60°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Lancaster. See also: June | July | August.
