S
M
T
W
T
F
S
26
64°
43°
27
65°
46°
28
61°
45°
29
59°
44°
30
59°
42°
1
63°
53°
2
64°
40°
3
67°
51°
4
71°
51°
5
72°
50°
6
66°
46°
7
68°
45°
8
72°
52°
9
75°
54°
10
75°
54°
11
73°
53°
12
76°
55°
13
76°
53°
14
68°
48°
15
68°
47°
16
70°
52°
17
77°
57°
18
78°
56°
19
77°
47°
20
67°
47°
21
68°
48°
22
69°
50°
23
70°
48°
24
77°
57°
25
80°
59°
26
81°
58°
27
77°
58°
28
71°
57°
29
74°
59°
30
78°
60°
31
79°
60°
1
80°
58°
2
78°
56°
3
76°
55°
4
75°
53°
5
78°
56°
6
81°
54°
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 59° to 81°, with overnight lows between 40° and 60°. The average high for May is 72° with an average low of 52°. 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.
