Heat high builds by the end of the work week. (Copyright 2025 by KSAT - All rights reserved.)
FORECAST HIGHLIGHTS
NORTHERN LIGHTS: Not as visible north of SA
STORMS POSSIBLE TUE/WED: Isolated activity, but a lucky few will get rain
HEAT HIGH: triple digits by the weekend
FORECAST
As we enter June, just like clockwork, our old foe the heat high is poised to make an appearance this week. That means temperatures will get hot by the weekend.
NORTHERN LIGHTS
A rather large geomagnetic storm produced visible northern lights as far south as north Texas and even some faint colors all the way down to Austin Sunday night. San Antonio just missed out. The geomagnetic storm has been downgraded, which means the lights will retreat even farther north tonight.
SMALL RAIN CHANCES
This evening, those along the Rio Grande could see a few storms move in from West Texas and Mexico. These storms will stay west of San Antonio. By Tuesday, however, the storms will move a little closer. Storm chances sit at 20% on Tuesday and go up a bit on Wednesday. Either way, the activity will be isolated. Only a lucky few will get rainfall.
HEAT HIGH RETURNS
Unfortunately, the heat high will make its first June appearance by Thursday. It’ll build some by the weekend, upping high temperatures to around 100°. Humidity will also be around, meaning heat index values will be well above 100°.
Triple digits return this weekend to San Antonio. (Copyright 2024 by KSAT - All rights reserved.)
Daily Forecast
KSAT meteorologists keep you on top of the ever-changing South Texas weather.
Justin Horne is a meteorologist and reporter for KSAT 12 News. When severe weather rolls through, Justin will hop in the KSAT 12 Storm Chaser to safely bring you the latest weather conditions from across South Texas. On top of delivering an accurate forecast, Justin often reports on one of his favorite topics: Texas history.