| NWS Forecast for: St. John The Baptist Parish Issued by: National Weather Service New Orleans/Baton Rouge, LA Last Update: 121 PM CDT Fri Jul 17 2026 | |
| This Afternoon: Mostly sunny. Near steady temperature in the mid 90s. West winds around 5 mph. Heat index values up to 110. Tonight: Partly cloudy in the evening, then becoming mostly clear. Humid with lows in the upper 70s. West winds around 5 mph. Heat index values up to 107 early in the evening. Saturday: Sunny with highs in the mid 90s. Northwest winds around 5 mph. Heat index values up to 111. Saturday Night: Partly cloudy with a slight chance of showers and thunderstorms in the evening, then mostly clear after midnight. Humid with lows in the upper 70s. West winds around 5 mph. Chance of rain 20 percent. Heat index values up to 109 early in the evening. Sunday: Sunny with highs in the upper 90s. Northwest winds around 5 mph. Heat index values up to 111. Sunday Night And Monday: Mostly clear. Lows in the upper 70s. Highs in the upper 90s. Heat index values up to 115. Monday Night And Tuesday: Mostly clear. A slight chance of showers and thunderstorms. Lows in the upper 70s. Highs in the upper 90s. Chance of rain 20 percent. Heat index values up to 115. Tuesday Night: Partly cloudy. Lows in the upper 70s. Heat index values up to 110 early in the evening. Wednesday: Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 90s. Chance of rain 20 percent. Heat index values up to 115. Wednesday Night: Mostly clear. Lows in the upper 70s. Heat index values up to 110 early in the evening. Thursday: Mostly sunny. A slight chance of showers and thunderstorms in the morning, then a chance of showers and thunderstorms in the afternoon. Highs in the upper 90s. Chance of rain 30 percent. Heat index values up to 115. | |
| Zone Forecast: St. John The Baptist Parish | |
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