S
M
T
W
T
F
S
26
81°
70°
27
86°
70°
28
86°
72°
29
81°
63°
30
72°
59°
1
61°
50°
2
72°
46°
3
73°
45°
4
77°
59°
5
82°
64°
6
82°
61°
7
68°
55°
8
75°
59°
9
88°
68°
10
86°
63°
11
79°
61°
12
82°
55°
13
86°
59°
14
86°
63°
15
86°
64°
16
84°
66°
17
81°
72°
18
88°
73°
19
88°
63°
20
81°
59°
21
79°
63°
22
82°
61°
23
81°
61°
24
84°
63°
25
82°
64°
26
81°
61°
27
82°
59°
28
86°
68°
29
88°
68°
30
88°
69°
31
90°
72°
1
91°
70°
2
90°
69°
3
88°
71°
4
83°
71°
5
84°
72°
6
88°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Boerne
Boerne's May 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 69° and 72°. The average high for May is 88° with an average low of 71°. 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 Boerne. See also: June | July | August.