S
M
T
W
T
F
S
26
67°
26°
27
74°
29°
28
67°
30°
29
66°
30°
30
51°
41°
1
53°
28°
2
49°
28°
3
46°
27°
4
64°
27°
5
80°
32°
6
57°
43°
7
55°
30°
8
50°
27°
9
57°
25°
10
63°
36°
11
56°
28°
12
51°
26°
13
50°
28°
14
56°
44°
15
65°
50°
16
75°
50°
17
75°
39°
18
77°
55°
19
86°
65°
20
76°
33°
21
57°
31°
22
64°
40°
23
64°
43°
24
64°
41°
25
68°
46°
26
66°
46°
27
68°
47°
28
72°
50°
29
75°
49°
30
72°
44°
31
67°
47°
1
69°
47°
2
66°
46°
3
66°
46°
4
65°
49°
5
67°
50°
6
72°
50°
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 86°, with overnight lows between 31° and 65°. The average high for May is 69° with an average low of 46°. 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.
