S
M
T
W
T
F
S
26
58°
43°
27
58°
44°
28
59°
43°
29
60°
42°
30
58°
40°
1
58°
41°
2
57°
42°
3
53°
39°
4
54°
39°
5
54°
40°
6
55°
39°
7
54°
39°
8
54°
40°
9
55°
42°
10
56°
43°
11
56°
41°
12
58°
44°
13
62°
46°
14
63°
46°
15
62°
45°
16
57°
45°
17
62°
46°
18
59°
44°
19
58°
47°
20
58°
46°
21
59°
46°
22
58°
43°
23
58°
46°
24
59°
47°
25
59°
48°
26
60°
46°
27
61°
48°
28
59°
47°
29
59°
46°
30
61°
48°
31
60°
47°
1
65°
48°
2
65°
49°
3
63°
43°
4
61°
44°
5
64°
46°
6
66°
44°
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 53° to 66°, with overnight lows between 39° and 49°. The average high for May is 59° with an average low of 44°. 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.
