S
M
T
W
T
F
S
26
61°
44°
27
62°
39°
28
64°
44°
29
62°
39°
30
62°
40°
1
66°
43°
2
65°
40°
3
64°
41°
4
67°
46°
5
72°
49°
6
74°
51°
7
75°
52°
8
76°
53°
9
77°
52°
10
77°
51°
11
66°
47°
12
69°
50°
13
73°
51°
14
68°
48°
15
68°
48°
16
71°
53°
17
74°
50°
18
71°
47°
19
71°
46°
20
69°
45°
21
70°
47°
22
70°
46°
23
71°
48°
24
70°
55°
25
74°
51°
26
76°
54°
27
82°
50°
28
73°
59°
29
73°
59°
30
83°
50°
31
76°
52°
1
74°
55°
2
77°
51°
3
76°
52°
4
80°
57°
5
84°
52°
6
75°
52°
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 61° to 84°, with overnight lows between 39° and 59°. The average high for May is 72° with an average low of 49°. 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.
