Jacksonville, FL December Weather: Cool Mornings Give Way to 70° Sunshine by Saturday

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Jacksonville, FL – The cool December air lingers this morning across the First Coast, but warmer days are quickly on the way. After a stretch of crisp, clear weather, Florida’s sunshine returns in full force this weekend — bringing highs near 70°F and a perfect setup for outdoor plans.

According to the National Weather Service in Jacksonville, high pressure over the Gulf is pushing drier, calmer air into the region. Morning lows near 40°F will steadily climb into the 60s by Friday and the low 70s by Saturday and Sunday. The warming trend marks a welcome shift after several chilly mornings that had locals reaching for sweaters and space heaters.

Drivers can expect good travel weather across I-95 and I-10, with excellent visibility and dry pavement through the weekend. Winds will remain light, occasionally breezy near the coast, but no rain is expected in the next five days.

For those decorating homes or enjoying early holiday markets, this weekend will feel like classic Florida winter — cool at dawn, comfortably warm by afternoon. Meteorologists note that while the rest of the East braces for Arctic cold, Florida will stay pleasantly mild through early next week before another weak front approaches midweek.

5-Day Outlook (Dec. 11–15):

  • Friday: Sunny, high 68°F.
  • Saturday: Mostly sunny, high 70°F.
  • Sunday: Sunny, high 71°F.
  • Monday: Sunny, high 70°F.
  • Tuesday: Mostly sunny, high 62°F.