S
M
T
W
T
F
S
26
64°
45°
27
64°
46°
28
55°
46°
29
66°
45°
30
72°
48°
1
59°
48°
2
61°
46°
3
61°
50°
4
63°
52°
5
59°
52°
6
57°
46°
7
59°
48°
8
64°
50°
9
66°
50°
10
55°
43°
11
57°
36°
12
57°
37°
13
55°
43°
14
54°
38°
15
57°
37°
16
53°
43°
17
57°
45°
18
55°
51°
19
59°
51°
20
62°
52°
21
68°
55°
22
69°
54°
23
69°
55°
24
71°
54°
25
69°
51°
26
68°
52°
27
60°
46°
28
59°
44°
29
59°
45°
30
60°
48°
31
60°
50°
1
64°
51°
2
66°
52°
3
67°
52°
4
66°
51°
5
65°
51°
6
63°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Treharris
Treharris's May 2026 forecast shows daily high temperatures ranging from 53° to 71°, with overnight lows between 37° and 55°. The average high for May is 63° 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 Treharris. See also: June | July | August.
