S
M
T
W
T
F
S
26
62°
46°
27
77°
43°
28
74°
55°
29
62°
46°
30
57°
36°
1
56°
36°
2
54°
31°
3
59°
48°
4
72°
57°
5
69°
44°
6
60°
39°
7
56°
37°
8
57°
42°
9
65°
47°
10
64°
46°
11
65°
48°
12
67°
47°
13
68°
40°
14
68°
52°
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 54° to 78°, with overnight lows between 31° and 59°. The average high for May is 70° with an average low of 51°. 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.
