S
M
T
W
T
F
S
26
62°
46°
27
77°
43°
28
74°
56°
29
60°
43°
30
59°
40°
1
53°
35°
2
54°
35°
3
61°
43°
4
62°
40°
5
65°
50°
6
68°
49°
7
65°
45°
8
63°
45°
9
62°
44°
10
64°
47°
11
65°
60°
12
74°
52°
13
74°
45°
14
67°
45°
15
66°
46°
16
67°
46°
17
68°
47°
18
71°
55°
19
78°
56°
20
77°
50°
21
71°
50°
22
71°
48°
23
73°
50°
24
79°
58°
25
81°
57°
26
76°
53°
27
72°
51°
28
75°
53°
29
80°
57°
30
81°
59°
31
82°
60°
1
83°
60°
2
83°
61°
3
84°
62°
4
84°
60°
5
79°
56°
6
82°
61°
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 84°, with overnight lows between 35° and 62°. The average high for May is 71° 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.
