S
M
T
W
T
F
S
26
59°
44°
27
60°
46°
28
74°
37°
29
78°
47°
30
83°
54°
1
85°
59°
2
87°
54°
3
76°
47°
4
65°
49°
5
64°
49°
6
84°
52°
7
91°
54°
8
89°
67°
9
94°
65°
10
98°
60°
11
98°
62°
12
100°
60°
13
82°
66°
14
90°
64°
15
87°
67°
16
74°
61°
17
70°
53°
18
71°
51°
19
80°
48°
20
85°
60°
21
90°
64°
22
91°
62°
23
89°
58°
24
88°
57°
25
86°
59°
26
78°
53°
27
78°
55°
28
84°
56°
29
89°
62°
30
88°
62°
31
90°
63°
1
92°
64°
2
90°
64°
3
87°
60°
4
82°
56°
5
87°
62°
6
88°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gloster
Gloster's May 2026 forecast shows daily high temperatures ranging from 78° to 92°, with overnight lows between 53° and 64°. The average high for May is 87° 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 Gloster. See also: June | July | August.