S
M
T
W
T
F
S
26
62°
41°
27
72°
37°
28
71°
40°
29
68°
45°
30
58°
48°
1
64°
41°
2
56°
47°
3
56°
40°
4
71°
40°
5
78°
52°
6
68°
54°
7
62°
43°
8
61°
41°
9
58°
44°
10
70°
53°
11
62°
52°
12
65°
42°
13
67°
47°
14
61°
54°
15
65°
49°
16
78°
48°
17
87°
57°
18
80°
60°
19
91°
65°
20
90°
48°
21
64°
44°
22
62°
47°
23
63°
51°
24
64°
50°
25
70°
52°
26
67°
53°
27
73°
51°
28
75°
54°
29
73°
55°
30
77°
51°
31
69°
55°
1
70°
52°
2
67°
51°
3
67°
52°
4
68°
56°
5
70°
56°
6
75°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Bolton
Bolton's May 2026 forecast shows daily high temperatures ranging from 62° to 91°, with overnight lows between 44° and 65°. The average high for May is 72° with an average low of 53°. 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 Bolton. See also: June | July | August.