S
M
T
W
T
F
S
26
77°
45°
27
69°
57°
28
62°
51°
29
60°
40°
30
61°
36°
1
56°
38°
2
60°
37°
3
69°
42°
4
78°
47°
5
58°
45°
6
58°
38°
7
63°
36°
8
64°
47°
9
78°
48°
10
67°
47°
11
69°
42°
12
81°
48°
13
69°
49°
14
73°
52°
15
79°
63°
16
79°
63°
17
87°
68°
18
79°
62°
19
79°
56°
20
69°
51°
21
67°
50°
22
70°
53°
23
75°
55°
24
78°
58°
25
79°
59°
26
79°
61°
27
78°
55°
28
80°
61°
29
80°
58°
30
73°
56°
31
73°
54°
1
74°
53°
2
74°
53°
3
75°
58°
4
78°
62°
5
83°
63°
6
84°
64°
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 67° to 87°, with overnight lows between 50° and 68°. The average high for May is 77° with an average low of 58°. 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.
