S
M
T
W
T
F
S
26
44°
33°
27
43°
31°
28
53°
28°
29
58°
32°
30
60°
34°
1
66°
37°
2
69°
44°
3
63°
37°
4
57°
39°
5
55°
35°
6
71°
36°
7
74°
40°
8
71°
44°
9
65°
40°
10
68°
40°
11
70°
39°
12
74°
41°
13
75°
42°
14
69°
37°
15
60°
33°
16
62°
35°
17
63°
36°
18
63°
35°
19
64°
34°
20
62°
35°
21
65°
42°
22
71°
42°
23
69°
39°
24
65°
37°
25
66°
38°
26
69°
42°
27
74°
46°
28
77°
47°
29
77°
47°
30
76°
48°
31
76°
46°
1
75°
46°
2
77°
48°
3
79°
49°
4
79°
49°
5
78°
48°
6
75°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Round Mountain
Round Mountain's May 2026 forecast shows daily high temperatures ranging from 55° to 79°, with overnight lows between 33° and 49°. The average high for May is 69° with an average low of 41°. 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 Round Mountain. See also: June | July | August.