S
M
T
W
T
F
S
26
57°
25°
27
54°
36°
28
46°
28°
29
43°
28°
30
46°
28°
1
57°
21°
2
66°
34°
3
73°
32°
4
46°
34°
5
39°
28°
6
48°
25°
7
57°
27°
8
63°
28°
9
55°
30°
10
54°
27°
11
70°
30°
12
66°
43°
13
77°
36°
14
81°
55°
15
75°
48°
16
54°
37°
17
54°
36°
18
46°
41°
19
48°
30°
20
66°
28°
21
73°
50°
22
72°
48°
23
57°
41°
24
79°
39°
25
81°
51°
26
82°
55°
27
81°
57°
28
85°
59°
29
86°
57°
30
76°
55°
31
79°
54°
1
78°
55°
2
81°
53°
3
79°
55°
4
74°
53°
5
78°
54°
6
78°
56°
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 74° to 86°, with overnight lows between 51° and 59°. The average high for May is 80° with an average low of 55°. 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.
