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°
62°
19
89°
66°
20
72°
51°
21
67°
49°
22
63°
53°
23
77°
62°
24
73°
61°
25
77°
61°
26
79°
64°
27
75°
59°
28
78°
49°
29
76°
50°
30
71°
48°
31
71°
48°
1
73°
51°
2
74°
52°
3
76°
55°
4
79°
57°
5
80°
58°
6
79°
58°
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 71° to 80°, with overnight lows between 48° and 64°. The average high for May is 76° with an average low of 55°. 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.
