S
M
T
W
T
F
S
26
62°
44°
27
79°
57°
28
74°
57°
29
61°
43°
30
59°
37°
1
55°
35°
2
54°
34°
3
64°
47°
4
69°
49°
5
72°
47°
6
63°
45°
7
67°
47°
8
69°
48°
9
68°
40°
10
67°
47°
11
68°
47°
12
74°
52°
13
74°
45°
14
67°
45°
15
66°
46°
16
67°
46°
17
68°
47°
18
71°
55°
19
78°
56°
20
77°
50°
21
71°
50°
22
71°
48°
23
73°
50°
24
79°
58°
25
81°
57°
26
76°
53°
27
72°
51°
28
75°
53°
29
80°
57°
30
81°
59°
31
82°
60°
1
83°
60°
2
83°
61°
3
84°
62°
4
84°
60°
5
79°
56°
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 54° to 84°, with overnight lows between 34° and 62°. The average high for May is 72° 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.
