S
M
T
W
T
F
S
26
63°
51°
27
69°
42°
28
72°
39°
29
73°
51°
30
71°
51°
1
64°
44°
2
54°
48°
3
65°
40°
4
79°
40°
5
81°
49°
6
81°
57°
7
69°
53°
8
72°
44°
9
76°
48°
10
85°
57°
11
69°
46°
12
73°
37°
13
78°
43°
14
76°
50°
15
75°
41°
16
85°
48°
17
92°
61°
18
94°
65°
19
93°
64°
20
93°
68°
21
87°
60°
22
77°
64°
23
81°
65°
24
83°
63°
25
81°
64°
26
80°
65°
27
80°
64°
28
81°
62°
29
81°
60°
30
82°
62°
31
83°
61°
1
84°
65°
2
84°
65°
3
83°
66°
4
81°
65°
5
80°
64°
6
82°
66°
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 77° to 94°, with overnight lows between 60° and 68°. The average high for May is 84° with an average low of 64°. 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.
