S
M
T
W
T
F
S
26
86°
67°
27
91°
74°
28
82°
73°
29
73°
60°
30
63°
60°
1
63°
53°
2
78°
48°
3
82°
53°
4
81°
60°
5
88°
68°
6
68°
56°
7
72°
58°
8
76°
63°
9
84°
66°
10
83°
59°
11
80°
61°
12
86°
66°
13
88°
68°
14
87°
69°
15
84°
67°
16
84°
68°
17
84°
66°
18
85°
67°
19
85°
68°
20
83°
65°
21
87°
68°
22
84°
68°
23
79°
67°
24
81°
69°
25
80°
68°
26
81°
69°
27
81°
68°
28
82°
68°
29
82°
67°
30
83°
66°
31
83°
66°
1
84°
67°
2
84°
67°
3
85°
69°
4
84°
72°
5
85°
72°
6
86°
71°
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 72° to 88°, with overnight lows between 58° and 72°. The average high for May is 83° with an average low of 67°. 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.
