FPUS52 KKEY 010919 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 419 AM EST Sun Mar 1 2026 FLZ076>078-020030- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 419 AM EST Sun Mar 1 2026 .TODAY...Partly cloudy with a slight chance for showers and thunderstorms. Patchy fog early. Highs near 80. Light and variable winds. Chance of rain 10 percent. .TONIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows near 70. Northeast winds 5 to 10 mph. Chance of rain 20 percent. .MONDAY...Mostly sunny with a slight chance of showers. Highs near 80. Northeast winds 10 to 15 mph. Chance of rain 20 percent. .MONDAY NIGHT...Partly cloudy with a slight chance of showers. Lows near 70. Northeast winds near 15 mph. Chance of rain 20 percent. .TUESDAY...Mostly sunny with a slight chance of showers. Highs near 80. East winds near 15 mph. Chance of rain 10 percent. .TUESDAY NIGHT AND WEDNESDAY...Partly cloudy with a slight chance of showers. Breezy. Lows in the lower 70s. Highs near 80. Chance of rain 10 percent. .WEDNESDAY NIGHT THROUGH SATURDAY...Partly cloudy with a slight chance of showers. Breezy. Lows in the lower 70s. Highs near 80. Chance of rain 20 percent. $$