S
M
T
W
T
F
S
26
80°
50°
27
75°
52°
28
72°
58°
29
76°
55°
30
74°
51°
1
72°
52°
2
64°
44°
3
68°
45°
4
72°
51°
5
73°
54°
6
76°
56°
7
76°
57°
8
79°
54°
9
74°
51°
10
75°
52°
11
75°
52°
12
78°
57°
13
83°
60°
14
83°
56°
15
73°
53°
16
72°
52°
17
73°
52°
18
75°
53°
19
77°
57°
20
81°
60°
21
82°
61°
22
82°
60°
23
78°
60°
24
79°
62°
25
83°
63°
26
85°
61°
27
80°
58°
28
79°
57°
29
79°
57°
30
80°
58°
31
81°
59°
1
81°
63°
2
82°
65°
3
84°
65°
4
85°
64°
5
82°
65°
6
82°
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 64° to 85°, with overnight lows between 44° and 65°. The average high for May is 78° with an average low of 57°. 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.
