S
M
T
W
T
F
S
26
63°
44°
27
59°
47°
28
59°
44°
29
66°
42°
30
73°
43°
1
64°
45°
2
61°
48°
3
58°
49°
4
58°
46°
5
56°
44°
6
57°
42°
7
58°
41°
8
59°
46°
9
60°
46°
10
55°
42°
11
54°
41°
12
55°
41°
13
55°
45°
14
53°
40°
15
54°
38°
16
53°
44°
17
55°
45°
18
56°
52°
19
60°
52°
20
62°
48°
21
64°
51°
22
67°
54°
23
67°
53°
24
66°
52°
25
63°
50°
26
64°
51°
27
58°
43°
28
56°
44°
29
56°
43°
30
57°
44°
31
57°
46°
1
60°
49°
2
63°
50°
3
64°
50°
4
63°
49°
5
61°
49°
6
59°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gleaston
Gleaston's May 2026 forecast shows daily high temperatures ranging from 53° to 67°, with overnight lows between 38° and 54°. The average high for May is 60° with an average low of 48°. 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 Gleaston. See also: June | July | August.