S
M
T
W
T
F
S
26
52°
45°
27
61°
41°
28
68°
41°
29
73°
41°
30
75°
46°
1
77°
48°
2
77°
54°
3
66°
50°
4
52°
48°
5
58°
48°
6
72°
51°
7
79°
51°
8
80°
48°
9
81°
55°
10
88°
57°
11
92°
58°
12
93°
57°
13
87°
53°
14
83°
50°
15
81°
50°
16
78°
49°
17
77°
50°
18
78°
47°
19
80°
52°
20
82°
52°
21
82°
51°
22
81°
52°
23
82°
52°
24
84°
53°
25
84°
52°
26
83°
52°
27
82°
51°
28
80°
51°
29
78°
52°
30
78°
52°
31
80°
53°
1
82°
53°
2
84°
54°
3
84°
54°
4
82°
53°
5
83°
53°
6
78°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Vallecito
Vallecito's May 2026 forecast shows daily high temperatures ranging from 58° to 93°, with overnight lows between 47° and 58°. The average high for May is 81° with an average low of 52°. 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 Vallecito. See also: June | July | August.
