| NWS Forecast for: Karnes County Issued by: National Weather Service Austin/San Antonio, TX Last Update: 439 AM CDT Thu Jul 23 2026 | |
Today: Partly cloudy. Hot with highs around 100. Northeast winds 10 to 15 mph. Highest heat index readings up to 110. Tonight: Mostly cloudy in the evening, then becoming partly cloudy. A chance of thunderstorms in the evening. A chance of showers. Lows in the upper 70s. East winds 10 to 15 mph, becoming west after midnight. Chance of rain 50 percent. Friday: Partly cloudy in the morning, then becoming mostly sunny. Highs in the mid 90s. Southeast winds 10 to 15 mph. Friday Night: Mostly clear. Lows in the mid 70s. Southeast winds 10 to 15 mph with gusts up to 25 mph. Saturday: Mostly sunny. Highs in the mid 90s. Southeast winds 10 to 15 mph. Saturday Night And Sunday: Mostly clear. Lows in the mid 70s. Highs in the mid 90s. Sunday Night Through Tuesday Night: Clear. Lows in the mid 70s. Highs in the upper 90s. Highest heat index readings up to 105. Wednesday: Mostly sunny. Highs in the upper 90s. Highest heat index readings up to 105. | |
| Zone Forecast: Karnes County | |
Visit your local NWS office at: https://www.weather.gov/ewx |