S
M
T
W
T
F
S
26
86°
79°
27
80°
73°
28
81°
72°
29
81°
71°
30
81°
70°
1
81°
72°
2
80°
72°
3
81°
76°
4
83°
76°
5
84°
78°
6
83°
76°
7
84°
76°
8
84°
75°
9
83°
76°
10
84°
73°
11
83°
74°
12
83°
74°
13
84°
73°
14
83°
74°
15
83°
74°
16
84°
73°
17
83°
74°
18
83°
74°
19
84°
73°
20
83°
74°
21
83°
74°
22
84°
75°
23
84°
74°
24
83°
75°
25
83°
74°
26
84°
74°
27
83°
75°
28
83°
75°
29
84°
74°
30
83°
75°
31
83°
75°
1
84°
74°
2
83°
75°
3
83°
75°
4
84°
74°
5
83°
75°
6
84°
75°
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 80° to 84°, with overnight lows between 70° and 78°. The average high for May is 83° with an average low of 74°. 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.
