S
M
T
W
T
F
S
26
73°
39°
27
61°
38°
28
60°
39°
29
62°
46°
30
63°
42°
1
63°
40°
2
64°
41°
3
67°
49°
4
70°
51°
5
75°
51°
6
75°
50°
7
68°
45°
8
71°
48°
9
74°
49°
10
76°
54°
11
77°
55°
12
78°
56°
13
76°
50°
14
69°
46°
15
71°
47°
16
71°
48°
17
70°
46°
18
71°
49°
19
73°
47°
20
75°
52°
21
74°
57°
22
79°
55°
23
81°
47°
24
76°
47°
25
72°
48°
26
72°
48°
27
73°
49°
28
73°
56°
29
80°
54°
30
74°
55°
31
81°
57°
1
80°
57°
2
76°
52°
3
74°
52°
4
75°
53°
5
82°
57°
6
82°
62°
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 38° and 62°. The average high for May is 73° with an average low of 50°. 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.
