S
M
T
W
T
F
S
26
88°
73°
27
88°
75°
28
88°
77°
29
81°
63°
30
68°
61°
1
57°
49°
2
74°
53°
3
77°
58°
4
81°
68°
5
86°
69°
6
84°
60°
7
79°
58°
8
74°
61°
9
79°
64°
10
83°
67°
11
86°
67°
12
85°
65°
13
86°
66°
14
85°
63°
15
88°
68°
16
87°
68°
17
88°
67°
18
87°
68°
19
88°
69°
20
89°
69°
21
85°
68°
22
82°
68°
23
84°
69°
24
88°
69°
25
86°
68°
26
83°
63°
27
83°
63°
28
84°
69°
29
85°
70°
30
87°
69°
31
88°
69°
1
88°
68°
2
89°
69°
3
91°
71°
4
91°
71°
5
90°
70°
6
91°
70°
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 57° to 91°, with overnight lows between 49° and 71°. The average high for May is 84° with an average low of 66°. 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.
