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
59°
39°
8
63°
51°
9
72°
50°
10
71°
44°
11
58°
37°
12
61°
50°
13
68°
53°
14
71°
52°
15
72°
51°
16
70°
51°
17
69°
52°
18
71°
52°
19
73°
63°
20
68°
48°
21
67°
47°
22
69°
49°
23
70°
52°
24
70°
51°
25
71°
50°
26
71°
49°
27
72°
49°
28
72°
50°
29
76°
54°
30
78°
58°
31
78°
59°
1
77°
57°
2
77°
54°
3
81°
60°
4
82°
61°
5
82°
61°
6
81°
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 58° to 82°, with overnight lows between 37° and 63°. The average high for May is 71° with an average low of 52°. 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.
