S
M
T
W
T
F
S
26
51°
34°
27
52°
33°
28
57°
37°
29
54°
34°
30
53°
37°
1
54°
35°
2
54°
32°
3
58°
37°
4
65°
44°
5
66°
41°
6
59°
38°
7
62°
44°
8
69°
46°
9
69°
44°
10
68°
40°
11
57°
40°
12
58°
39°
13
59°
43°
14
59°
43°
15
63°
46°
16
68°
47°
17
63°
48°
18
67°
38°
19
67°
37°
20
61°
37°
21
62°
36°
22
61°
37°
23
62°
38°
24
63°
41°
25
65°
41°
26
67°
45°
27
70°
38°
28
64°
44°
29
65°
48°
30
71°
41°
31
67°
43°
1
65°
45°
2
69°
44°
3
67°
53°
4
73°
49°
5
75°
45°
6
68°
45°
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 51° to 75°, with overnight lows between 32° and 53°. The average high for May is 63° with an average low of 41°. 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.