S
M
T
W
T
F
S
26
73°
52°
27
80°
57°
28
79°
61°
29
69°
45°
30
62°
43°
1
56°
39°
2
53°
37°
3
62°
44°
4
70°
50°
5
72°
53°
6
68°
47°
7
63°
46°
8
63°
47°
9
65°
49°
10
67°
52°
11
68°
51°
12
73°
57°
13
71°
52°
14
68°
49°
15
67°
49°
16
68°
50°
17
69°
49°
18
70°
56°
19
77°
59°
20
77°
59°
21
73°
58°
22
74°
56°
23
76°
57°
24
80°
61°
25
80°
60°
26
76°
54°
27
73°
54°
28
74°
53°
29
77°
57°
30
80°
59°
31
82°
61°
1
83°
62°
2
83°
63°
3
82°
63°
4
82°
62°
5
79°
62°
6
82°
63°
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 83°, with overnight lows between 37° and 63°. The average high for May is 73° with an average low of 54°. 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.
