S
M
T
W
T
F
S
26
62°
46°
27
77°
43°
28
74°
55°
29
62°
46°
30
57°
37°
1
55°
32°
2
55°
31°
3
61°
48°
4
72°
59°
5
72°
56°
6
60°
45°
7
56°
37°
8
57°
45°
9
61°
47°
10
67°
47°
11
69°
51°
12
69°
52°
13
70°
49°
14
66°
41°
15
71°
54°
16
68°
50°
17
71°
55°
18
76°
57°
19
77°
57°
20
76°
58°
21
78°
58°
22
78°
57°
23
77°
57°
24
74°
52°
25
71°
53°
26
77°
59°
27
78°
57°
28
74°
58°
29
74°
56°
30
73°
55°
31
78°
56°
1
73°
52°
2
75°
59°
3
76°
53°
4
72°
52°
5
73°
52°
6
73°
53°
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 55° to 78°, with overnight lows between 31° and 59°. The average high for May is 70° 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.
