S
M
T
W
T
F
S
31
87°
65°
1
90°
63°
2
87°
65°
3
85°
64°
4
77°
61°
5
82°
59°
6
85°
61°
7
84°
63°
8
82°
66°
9
85°
65°
10
86°
64°
11
85°
64°
12
83°
64°
13
84°
65°
14
87°
63°
15
87°
62°
16
88°
61°
17
87°
62°
18
87°
62°
19
86°
63°
20
86°
63°
21
85°
61°
22
85°
61°
23
86°
62°
24
85°
62°
25
85°
63°
26
86°
62°
27
86°
63°
28
85°
62°
29
85°
62°
30
84°
63°
1
84°
62°
2
85°
61°
3
84°
61°
4
84°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Unión de San Antonio
Unión de San Antonio's June 2026 forecast shows daily high temperatures ranging from 77° to 90°, with overnight lows between 59° and 66°. The average high for June is 85° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Unión de San Antonio. See also: July | August | September.
