Florida Weather Alert: The pavement is already radiating heat, and the humid air feels heavier with each passing hour. Across northeast Florida, today’s biggest weather story isn’t the chance of rain—it’s the dangerous combination of heat and humidity that will make it feel well above 100 degrees before scattered afternoon storms offer only brief relief.
Jacksonville, Florida – According to the National Weather Service in Jacksonville, a Heat Advisory remains in effect from 11 a.m. until 8 p.m. EDT for much of northeast Florida and southeast Georgia, including the Jacksonville metro. Forecasters expect heat index values between 107 and 111 degrees, creating a heightened risk of heat-related illness for anyone spending extended time outdoors.
Temperatures will climb to 96 degrees this afternoon under mostly sunny skies before isolated showers and thunderstorms develop after 1 p.m. The humidity will make conditions feel significantly hotter, especially across parking lots, construction sites, athletic fields, and beaches. Anyone traveling along Interstate 95, Interstate 10, Interstate 295, Butler Boulevard, or U.S. 17 should keep extra water in the vehicle and avoid leaving children or pets inside parked cars, even for a short time.
The hottest weather arrives before storms develop. By late afternoon, scattered thunderstorms may briefly cool temperatures, but they can also produce lightning, localized downpours, and gusty winds. Rain coverage remains relatively limited today before becoming more widespread by Wednesday, when thunderstorm chances increase to 60%.
Meteorologists continue to monitor the broader pattern across the Southeast, where dangerous heat remains the dominant concern. Daily thunderstorms will provide only temporary relief while highs stay in the upper 90s through midweek.
Drink plenty of water, wear lightweight clothing, and take frequent breaks in air-conditioned spaces if working outside. Check on elderly neighbors and anyone without reliable cooling, and know the warning signs of heat exhaustion and heat stroke.
Looking beyond midweek, scattered afternoon thunderstorms remain part of the typical summer pattern, while the Climate Prediction Center continues to favor above-normal temperatures across the Southeast during the 6-to-10-day outlook.
Five-Day Forecast for Jacksonville, Florida
- Today: Mostly sunny and hot. High 96°F. Heat index 109°F. Slight chance of afternoon thunderstorms (20%).
- Tonight: Mostly cloudy. Low 79°F. Chance of thunderstorms 30%.
- Tuesday: Mostly sunny and hot. High 99°F. Heat index 111°F. Slight chance of late-day thunderstorms (10%).
- Tuesday Night: Partly cloudy. Low 81°F.
- Wednesday: Mostly sunny and hot with showers and thunderstorms likely after 2 p.m. High 98°F. Chance of rain 60%.
