S
M
T
W
T
F
S
26
63°
45°
27
64°
41°
28
57°
43°
29
66°
36°
30
70°
41°
1
63°
39°
2
59°
50°
3
54°
48°
4
57°
45°
5
57°
45°
6
54°
41°
7
57°
45°
8
57°
39°
9
54°
36°
10
55°
34°
11
55°
39°
12
57°
45°
13
55°
39°
14
57°
37°
15
54°
34°
16
55°
34°
17
55°
45°
18
55°
45°
19
59°
46°
20
59°
48°
21
64°
52°
22
N/A
23
64°
51°
24
68°
50°
25
67°
47°
26
68°
47°
27
71°
52°
28
72°
51°
29
64°
48°
30
63°
47°
31
63°
49°
1
61°
50°
2
61°
50°
3
62°
49°
4
57°
44°
5
58°
48°
6
58°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Newton Mearns
Newton Mearns's May 2026 forecast shows daily high temperatures ranging from 57° to 72°, with overnight lows between 44° and 52°. The average high for May is 64° 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 Newton Mearns. See also: June | July | August.
