| NWS Forecast for: San Jacinto County Issued by: National Weather Service Houston, TX Last Update: 1138 AM CDT Thu Aug 20 2026 |  |
This Afternoon: Sunny, hot with highs in the upper 90s. Southwest winds around 5 mph. Heat index values up to 108. Tonight: Mostly clear. Lows in the upper 70s. South winds 5 to 10 mph. Heat index values up to 107 early in the evening. Friday: Mostly sunny. Hot with highs around 102. Southwest winds around 5 mph. Heat index values up to 111. Friday Night: Partly cloudy. A chance of showers and thunderstorms in the evening. Lows in the upper 70s. South winds around 5 mph. Chance of rain 30 percent. Heat index values up to 108 early in the evening. Saturday: Mostly sunny. Hot with highs around 102. Southwest winds around 5 mph. Heat index values up to 112. Saturday Night: Mostly clear. Lows in the upper 70s. Heat index values up to 110 early in the evening. Sunday: Mostly sunny. Hot with highs around 100. Heat index values up to 110. Sunday Night: Mostly clear. Lows in the upper 70s. Heat index values up to 110 early in the evening. Monday: Sunny, hot with highs in the upper 90s. Heat index values up to 110. Monday Night: Mostly clear in the evening, then becoming partly cloudy. Lows in the mid 70s. Heat index values up to 105 early in the evening. Tuesday: Mostly sunny. Hot with highs in the upper 90s. Heat index values up to 110. Tuesday Night: Partly cloudy in the evening, then becoming mostly clear. Lows in the mid 70s. Heat index values up to 105 early in the evening. Wednesday: Mostly sunny. Hot with highs in the upper 90s. Heat index values up to 110. | |
| Zone Forecast: San Jacinto County | |
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