S
M
T
W
T
F
S
26
83°
61°
27
84°
62°
28
84°
62°
29
82°
61°
30
83°
62°
1
81°
62°
2
77°
61°
3
76°
60°
4
77°
63°
5
78°
62°
6
78°
64°
7
79°
64°
8
77°
63°
9
78°
64°
10
78°
64°
11
79°
63°
12
81°
65°
13
79°
65°
14
81°
64°
15
80°
65°
16
79°
65°
17
80°
63°
18
85°
63°
19
89°
66°
20
88°
65°
21
89°
64°
22
88°
65°
23
88°
64°
24
88°
67°
25
88°
67°
26
89°
66°
27
90°
65°
28
89°
66°
29
90°
66°
30
91°
64°
31
91°
66°
1
90°
67°
2
91°
66°
3
91°
66°
4
92°
67°
5
92°
69°
6
91°
68°
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 76° to 92°, with overnight lows between 60° and 69°. The average high for May is 84° with an average low of 64°. 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.