FPUS52 KKEY 210759 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 359 AM EDT Sun Jun 21 2026 FLZ076>078-212130- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 359 AM EDT Sun Jun 21 2026 .TODAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs near 90. East to southeast winds 5 to 10 mph, briefly becoming variable near 5 mph in the afternoon. Chance of rain 10 percent. .TONIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower to mid 80s. North to northeast winds 5 to 10 mph, becoming east to southeast after midnight. Chance of rain 20 percent. .MONDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs near 90. Southeast winds 5 to 10 mph. Chance of rain 10 percent. .MONDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower to mid 80s. East to southeast winds near 10 mph. Chance of rain 10 percent. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs near 90. Southeast winds 5 to 10 mph. Chance of rain 10 percent. .TUESDAY NIGHT...Partly cloudy. Lows in the lower to mid 80s. .WEDNESDAY...Mostly sunny. Highs near 90. .WEDNESDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower to mid 80s. Chance of rain 10 percent. .THURSDAY THROUGH FRIDAY...Mostly clear with a slight chance of showers. Highs near 90. Lows in the lower to mid 80s. Chance of rain 10 percent. .FRIDAY NIGHT...Mostly clear. Lows in the lower to mid 80s. .SATURDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs near 90. Chance of rain 10 percent. $$