S
M
T
W
T
F
S
26
60°
43°
27
73°
41°
28
70°
50°
29
64°
47°
30
51°
42°
1
55°
34°
2
47°
34°
3
58°
34°
4
72°
48°
5
75°
57°
6
61°
44°
7
58°
38°
8
63°
46°
9
64°
46°
10
69°
49°
11
59°
39°
12
58°
40°
13
67°
50°
14
64°
48°
15
64°
47°
16
70°
49°
17
73°
48°
18
76°
52°
19
73°
52°
20
77°
53°
21
74°
50°
22
72°
45°
23
66°
44°
24
67°
46°
25
68°
47°
26
68°
46°
27
68°
46°
28
69°
47°
29
70°
46°
30
70°
47°
31
75°
57°
1
72°
53°
2
73°
50°
3
73°
53°
4
75°
56°
5
77°
54°
6
81°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Clairton
Clairton's May 2026 forecast shows daily high temperatures ranging from 58° to 81°, with overnight lows between 38° and 58°. The average high for May is 69° with an average low of 49°. 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 Clairton. See also: June | July | August.