S
M
T
W
T
F
S
26
65°
43°
27
69°
45°
28
65°
46°
29
68°
45°
30
70°
44°
1
73°
46°
2
72°
46°
3
70°
46°
4
69°
45°
5
73°
44°
6
73°
47°
7
74°
46°
8
72°
46°
9
68°
44°
10
68°
44°
11
69°
45°
12
70°
46°
13
70°
45°
14
71°
47°
15
72°
47°
16
70°
46°
17
68°
44°
18
69°
45°
19
70°
47°
20
73°
50°
21
77°
51°
22
77°
50°
23
74°
49°
24
72°
50°
25
75°
51°
26
78°
51°
27
78°
50°
28
77°
51°
29
78°
51°
30
78°
50°
31
77°
48°
1
72°
47°
2
73°
49°
3
74°
48°
4
77°
49°
5
80°
50°
6
80°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Buellton
Buellton's May 2026 forecast shows daily high temperatures ranging from 65° to 80°, with overnight lows between 43° and 51°. The average high for May is 73° with an average low of 47°. 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 Buellton. See also: June | July | August.