S
M
T
W
T
F
S
26
60°
46°
27
60°
41°
28
62°
47°
29
64°
46°
30
69°
44°
1
62°
43°
2
62°
42°
3
61°
45°
4
67°
47°
5
63°
44°
6
61°
44°
7
63°
45°
8
68°
46°
9
64°
45°
10
63°
44°
11
63°
45°
12
65°
48°
13
74°
56°
14
76°
55°
15
75°
56°
16
77°
56°
17
73°
53°
18
71°
51°
19
69°
50°
20
74°
56°
21
74°
52°
22
68°
49°
23
69°
50°
24
70°
51°
25
71°
51°
26
75°
58°
27
79°
59°
28
80°
53°
29
78°
53°
30
72°
55°
31
72°
60°
1
79°
53°
2
75°
52°
3
73°
51°
4
72°
53°
5
73°
55°
6
76°
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 60° to 80°, with overnight lows between 41° and 61°. The average high for May is 70° with an average low of 50°. 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.
