S
M
T
W
T
F
S
31
85°
59°
1
74°
58°
2
74°
58°
3
73°
55°
4
76°
58°
5
73°
57°
6
77°
63°
7
78°
58°
8
79°
60°
9
82°
61°
10
84°
62°
11
84°
61°
12
85°
62°
13
82°
63°
14
83°
60°
15
84°
64°
16
84°
63°
17
83°
64°
18
85°
64°
19
85°
63°
20
84°
64°
21
85°
64°
22
85°
63°
23
86°
64°
24
86°
64°
25
85°
63°
26
85°
64°
27
86°
63°
28
84°
61°
29
82°
61°
30
84°
62°
1
85°
63°
2
86°
65°
3
87°
65°
4
86°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in San Marcos
San Marcos's June 2026 forecast shows daily high temperatures ranging from 73° to 87°, with overnight lows between 55° and 65°. The average high for June is 82° with an average low of 62°. 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 San Marcos. See also: July | August | September.
