S
M
T
W
T
F
S
26
70°
49°
27
76°
59°
28
71°
44°
29
67°
47°
30
65°
50°
1
58°
43°
2
57°
41°
3
61°
41°
4
68°
45°
5
65°
52°
6
65°
45°
7
64°
43°
8
65°
42°
9
65°
44°
10
66°
43°
11
66°
47°
12
68°
55°
13
74°
54°
14
70°
52°
15
67°
47°
16
66°
45°
17
66°
46°
18
67°
48°
19
66°
49°
20
67°
48°
21
68°
47°
22
69°
49°
23
71°
54°
24
73°
55°
25
71°
50°
26
70°
49°
27
71°
52°
28
72°
58°
29
72°
59°
30
73°
59°
31
73°
58°
1
72°
59°
2
73°
58°
3
74°
56°
4
78°
60°
5
84°
55°
6
78°
60°
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 57° to 84°, with overnight lows between 41° and 60°. The average high for May is 69° 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.
