S
M
T
W
T
F
S
31
89°
68°
1
93°
72°
2
91°
71°
3
88°
70°
4
87°
70°
5
83°
72°
6
86°
74°
7
87°
76°
8
91°
74°
9
92°
73°
10
92°
73°
11
92°
75°
12
93°
74°
13
94°
73°
14
93°
72°
15
94°
75°
16
94°
74°
17
93°
74°
18
87°
73°
19
88°
74°
20
89°
75°
21
90°
73°
22
90°
75°
23
91°
74°
24
90°
74°
25
90°
75°
26
91°
74°
27
90°
75°
28
91°
74°
29
92°
75°
30
91°
74°
1
92°
73°
2
93°
72°
3
94°
75°
4
96°
75°
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 83° to 96°, with overnight lows between 70° and 76°. The average high for June is 91° with an average low of 74°. 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.
