S
M
T
W
T
F
S
26
72°
38°
27
58°
43°
28
61°
46°
29
72°
40°
30
83°
46°
1
76°
49°
2
72°
49°
3
93°
50°
4
75°
54°
5
65°
53°
6
70°
55°
7
72°
53°
8
69°
50°
9
81°
47°
10
71°
52°
11
82°
48°
12
82°
52°
13
64°
52°
14
64°
50°
15
59°
45°
16
57°
45°
17
66°
41°
18
73°
45°
19
70°
46°
20
71°
48°
21
85°
48°
22
83°
50°
23
76°
51°
24
80°
46°
25
63°
48°
26
64°
48°
27
74°
50°
28
80°
54°
29
67°
46°
30
71°
45°
31
73°
48°
1
87°
55°
2
85°
57°
3
82°
55°
4
81°
53°
5
79°
51°
6
78°
53°
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 63° to 87°, with overnight lows between 45° and 57°. The average high for May is 76° with an average low of 51°. 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.