S
M
T
W
T
F
S
26
62°
46°
27
77°
43°
28
74°
55°
29
62°
46°
30
57°
37°
1
55°
34°
2
51°
30°
3
62°
29°
4
73°
50°
5
72°
52°
6
57°
41°
7
58°
38°
8
64°
51°
9
69°
50°
10
74°
50°
11
60°
40°
12
61°
41°
13
69°
53°
14
71°
53°
15
72°
55°
16
70°
51°
17
71°
52°
18
68°
50°
19
75°
56°
20
78°
52°
21
75°
52°
22
70°
47°
23
67°
47°
24
69°
49°
25
69°
51°
26
70°
49°
27
70°
49°
28
71°
50°
29
71°
50°
30
72°
52°
31
77°
59°
1
73°
54°
2
74°
52°
3
75°
58°
4
76°
58°
5
79°
60°
6
82°
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 57° to 82°, with overnight lows between 38° and 61°. The average high for May is 71° with an average low of 51°. 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.
