Extreme Heat Warning

* WHAT...Dangerously hot conditions with heat index values up to 115 expected.

* WHERE...The I-35 corridor, Coastal Plains, and southern Rio Grande Plains.

* WHEN...From noon to 8 PM CDT Thursday.

* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.

* ADDITIONAL DETAILS...Conditions Thursday will be more extreme than the heat so far this summer. The risk of heat related illnesses will be higher with little time to adjust to the extreme heat.

Thursday, Jun 18, 8:00 PM CDT
Clear
78°
Feels 78°
 89%
Dewpt 75°
 sse
5 - 11 mph
Thursday, Jun 18
Clear conditions throughout the day.
78 98 78 - 98
Friday, Jun 19
Partly cloudy throughout the day with strong storms possible.
80 94 80 - 94
Saturday, Jun 20
Partly cloudy throughout the day with storms possible.
78 91 78 - 91
Sunday, Jun 21
Partly cloudy throughout the day with strong storms possible.
78 93 78 - 93
Monday, Jun 22
Partly cloudy throughout the day.
78 95 78 - 95
Tuesday, Jun 23
Partly cloudy throughout the day.
78 94 78 - 94
Wednesday, Jun 24
Partly cloudy throughout the day.
77 95 77 - 95
Thursday, Jun 25
Partly cloudy throughout the day.
75 96 75 - 96
Friday, Jun 26
Partly cloudy throughout the day.
74 91 74 - 91
Saturday, Jun 27
Clear conditions throughout the day.
74 97 74 - 97
Sunday, Jun 28
Partly cloudy throughout the day.
75 96 75 - 96
Monday, Jun 29
Partly cloudy throughout the day.
74 88 74 - 88
Tuesday, Jun 30
Partly cloudy throughout the day.
73 88 73 - 88
Wednesday, Jul 1
Becoming cloudy in the afternoon.
73 91 73 - 91
Thursday, Jul 2
Cloudy skies throughout the day.
74 79 74 - 79
Weather forecast for San Antonio, TX on Thu, 18 Jun 2026 08:57:02 GMT