S
M
T
W
T
F
S
26
88°
73°
27
88°
75°
28
88°
77°
29
81°
63°
30
68°
61°
1
64°
53°
2
75°
49°
3
81°
49°
4
83°
57°
5
86°
70°
6
78°
62°
7
69°
59°
8
82°
62°
9
89°
71°
10
90°
64°
11
81°
64°
12
84°
63°
13
90°
63°
14
90°
64°
15
91°
70°
16
89°
70°
17
88°
75°
18
91°
77°
19
91°
64°
20
78°
70°
21
77°
69°
22
85°
72°
23
80°
66°
24
80°
65°
25
81°
66°
26
86°
71°
27
81°
70°
28
80°
69°
29
84°
71°
30
84°
70°
31
85°
71°
1
88°
70°
2
89°
68°
3
84°
71°
4
87°
70°
5
87°
71°
6
88°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Round Rock
Round Rock's May 2026 forecast shows daily high temperatures ranging from 77° to 89°, with overnight lows between 65° and 72°. The average high for May is 84° with an average low of 70°. 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 Rock. See also: June | July | August.
