S
M
T
W
T
F
S
26
67°
34°
27
61°
37°
28
63°
42°
29
66°
33°
30
75°
37°
1
71°
48°
2
67°
47°
3
83°
44°
4
67°
53°
5
67°
50°
6
71°
48°
7
71°
49°
8
69°
45°
9
75°
37°
10
71°
45°
11
76°
43°
12
77°
47°
13
66°
43°
14
70°
42°
15
66°
39°
16
60°
46°
17
63°
40°
18
71°
40°
19
72°
36°
20
71°
43°
21
81°
44°
22
80°
44°
23
76°
43°
24
81°
43°
25
64°
48°
26
63°
46°
27
68°
48°
28
75°
50°
29
65°
45°
30
64°
38°
31
70°
45°
1
78°
51°
2
84°
51°
3
80°
50°
4
78°
51°
5
76°
50°
6
76°
51°
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 63° to 84°, with overnight lows between 38° and 51°. The average high for May is 72° with an average low of 48°. 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.
