National Weather Service United States Department of Commerce

Oppressive heat and humidity building into the central and southeast U.S.

A heat wave is building into parts of the central and southeast U.S. this week. The combination of heat and humidity will lead to dangerous heat indices, especially in parts of the central Mississippi River Valley where an Excessive Heat Warning is in effect. Heat Advisories are in effect elsewhere across the region. Relief is not expected for several days.
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Current Conditions

St. Johns County

Zone Forecast

  • Today Mostly sunny in the morning...then partly cloudy with a 20 percent chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. West winds 5 mph shifting to the east in the afternoon. Heat index readings 104 to 108 in the afternoon.
  • Tonight Partly cloudy with a 20 percent chance of showers and thunderstorms in the evening...then mostly clear after midnight. Lows in the mid 70s. South winds 5 to 10 mph. Heat index readings 99 to 103.
  • Friday Mostly sunny in the morning...then partly cloudy with a 20 percent chance of showers and thunderstorms in the afternoon. Highs in the mid 90s inland...in the lower 90s coast. West winds 5 mph shifting to the south in the afternoon. Heat index readings 101 to 105.
  • Friday Night Partly cloudy. A 20 percent chance of showers and thunderstorms in the evening. Lows in the upper 70s. South winds 5 to 10 mph.
  • Saturday Partly cloudy. A 30 percent chance of showers and thunderstorms in the afternoon. Highs in the mid 90s. West winds 5 to 10 mph shifting to the east in the afternoon.
  • Saturday Night Partly cloudy with a 20 percent chance of showers and thunderstorms. Lows in the upper 70s.
  • Sunday And Sunday Night Partly cloudy with a 40 percent chance of showers and thunderstorms. Highs in the lower 90s. Lows in the upper 70s.
  • Monday Mostly cloudy with a 50 percent chance of showers and thunderstorms. Highs in the upper 80s.
  • Monday Night Mostly cloudy with a 40 percent chance of showers and thunderstorms. Lows in the mid 70s.
  • Tuesday Mostly cloudy with a 50 percent chance of showers and thunderstorms. Highs in the upper 80s.
  • Tuesday Night And Wednesday Mostly cloudy with a 40 percent chance of showers and thunderstorms. Lows in the mid 70s. Highs in the upper 80s.