S
M
T
W
T
F
S
26
75°
56°
27
72°
50°
28
61°
44°
29
64°
41°
30
68°
39°
1
67°
33°
2
66°
34°
3
80°
49°
4
89°
50°
5
59°
50°
6
62°
44°
7
74°
41°
8
66°
48°
9
89°
43°
10
73°
52°
11
84°
46°
12
87°
56°
13
81°
46°
14
83°
50°
15
94°
63°
16
91°
64°
17
84°
64°
18
81°
63°
19
65°
49°
20
66°
44°
21
64°
55°
22
73°
60°
23
75°
52°
24
83°
48°
25
85°
58°
26
84°
63°
27
79°
62°
28
75°
64°
29
75°
60°
30
76°
60°
31
75°
57°
1
79°
55°
2
76°
56°
3
79°
59°
4
78°
61°
5
80°
61°
6
79°
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 75° to 85°, with overnight lows between 55° and 64°. The average high for May is 78° with an average low of 60°. 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.
