S
M
T
W
T
F
S
26
55°
48°
27
64°
47°
28
65°
42°
29
67°
46°
30
69°
55°
1
65°
44°
2
60°
46°
3
62°
48°
4
78°
51°
5
84°
61°
6
71°
64°
7
72°
46°
8
71°
45°
9
78°
56°
10
81°
57°
11
67°
44°
12
68°
42°
13
78°
54°
14
64°
56°
15
71°
55°
16
N/A
17
90°
65°
18
93°
68°
19
96°
68°
20
97°
60°
21
69°
51°
22
63°
53°
23
71°
56°
24
74°
58°
25
74°
59°
26
79°
58°
27
79°
60°
28
80°
59°
29
81°
57°
30
83°
62°
31
82°
61°
1
83°
62°
2
79°
62°
3
77°
63°
4
80°
62°
5
79°
61°
6
78°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Lancaster
Lancaster's May 2026 forecast shows daily high temperatures ranging from 63° to 97°, with overnight lows between 51° and 68°. The average high for May is 80° with an average low of 60°. 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.
