S
M
T
W
T
F
S
26
52°
38°
27
69°
38°
28
63°
37°
29
67°
50°
30
67°
49°
1
65°
44°
2
60°
46°
3
60°
43°
4
75°
44°
5
82°
61°
6
71°
64°
7
64°
49°
8
69°
44°
9
73°
55°
10
82°
52°
11
61°
46°
12
67°
45°
13
73°
54°
14
63°
54°
15
69°
51°
16
82°
49°
17
85°
62°
18
94°
60°
19
95°
71°
20
94°
70°
21
71°
57°
22
60°
53°
23
56°
53°
24
64°
55°
25
73°
63°
26
79°
65°
27
76°
62°
28
77°
56°
29
79°
53°
30
70°
54°
31
71°
55°
1
74°
52°
2
72°
55°
3
78°
58°
4
79°
60°
5
80°
60°
6
80°
61°
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 70° to 80°, with overnight lows between 52° and 65°. The average high for May is 76° with an average low of 58°. 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.