S
M
T
W
T
F
S
26
58°
43°
27
71°
39°
28
58°
42°
29
59°
49°
30
65°
48°
1
67°
38°
2
60°
45°
3
62°
42°
4
75°
39°
5
84°
58°
6
69°
56°
7
64°
42°
8
65°
49°
9
62°
46°
10
75°
51°
11
62°
41°
12
62°
44°
13
60°
47°
14
66°
48°
15
69°
52°
16
74°
51°
17
73°
52°
18
76°
55°
19
78°
55°
20
74°
52°
21
70°
48°
22
68°
49°
23
69°
49°
24
70°
50°
25
72°
53°
26
76°
55°
27
73°
52°
28
75°
53°
29
73°
50°
30
76°
56°
31
81°
59°
1
77°
59°
2
80°
56°
3
80°
59°
4
82°
60°
5
82°
60°
6
81°
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 60° to 82°, with overnight lows between 41° and 61°. The average high for May is 72° with an average low of 52°. 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.
