S
M
T
W
T
F
S
26
64°
45°
27
64°
46°
28
75°
38°
29
79°
43°
30
84°
48°
1
86°
52°
2
88°
51°
3
75°
50°
4
65°
50°
5
66°
48°
6
84°
47°
7
92°
51°
8
91°
56°
9
94°
51°
10
98°
56°
11
99°
58°
12
97°
58°
13
83°
57°
14
88°
56°
15
85°
57°
16
79°
60°
17
78°
50°
18
79°
47°
19
88°
54°
20
90°
58°
21
94°
63°
22
91°
61°
23
90°
60°
24
89°
61°
25
84°
58°
26
81°
58°
27
85°
56°
28
87°
58°
29
89°
60°
30
86°
57°
31
86°
59°
1
90°
61°
2
91°
62°
3
91°
62°
4
90°
61°
5
92°
63°
6
91°
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 78° to 94°, with overnight lows between 47° and 63°. The average high for May is 88° with an average low of 59°. 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.
