S
M
T
W
T
F
S
26
64°
43°
27
66°
45°
28
55°
43°
29
64°
41°
30
70°
43°
1
73°
39°
2
64°
46°
3
61°
52°
4
55°
45°
5
57°
45°
6
54°
41°
7
59°
43°
8
63°
46°
9
66°
46°
10
57°
37°
11
54°
37°
12
57°
34°
13
54°
45°
14
55°
41°
15
55°
41°
16
55°
41°
17
57°
45°
18
55°
45°
19
61°
50°
20
64°
52°
21
N/A
22
80°
57°
23
77°
51°
24
82°
57°
25
88°
61°
26
81°
51°
27
73°
48°
28
76°
53°
29
77°
55°
30
75°
53°
31
73°
55°
1
72°
52°
2
71°
53°
3
60°
48°
4
61°
47°
5
61°
48°
6
62°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Harlaston
Harlaston's May 2026 forecast shows daily high temperatures ranging from 60° to 88°, with overnight lows between 47° and 61°. The average high for May is 73° with an average low of 52°. 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 Harlaston. See also: June | July | August.