FPUS52 KKEY 170809 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 409 AM EDT Fri Apr 17 2026 FLZ076>078-172115- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 409 AM EDT Fri Apr 17 2026 .TODAY...Partly sunny with a slight chance of sprinkles or a brief light shower in the morning, then becoming mostly sunny. Highs in the lower to mid 80s. Northeast to east winds 5 to 10 mph. Chance of rain 10 percent. .TONIGHT...Partly cloudy with a slight chance of showers. Lows in the mid 70s. East winds increasing to near 10 mph. Chance of rain 10 percent. .SATURDAY...Partly sunny. Highs in the lower to mid 80s. East winds near 10 mph. .SATURDAY NIGHT...Partly cloudy with a slight chance of showers. Lows in the mid 70s. East winds decreasing to 5 to 10 mph. Chance of rain 10 percent. .SUNDAY...Partly sunny with a slight chance of showers. Highs in the lower to mid 80s. East winds near 5 mph. Chance of rain 10 percent. .SUNDAY NIGHT AND MONDAY...Partly cloudy with a slight chance of showers. Lows in the mid 70s. Highs in the lower to mid 80s. Chance of rain 10 percent. .MONDAY NIGHT...Mostly cloudy with a slight chance of showers. Breezy early, becoming windy. Lows in the lower 70s. Chance of rain 20 percent. .TUESDAY AND TUESDAY NIGHT...Mostly cloudy. Windy. Highs near 80. Lows in the lower 70s. .WEDNESDAY...Mostly cloudy. Windy, becoming breezy. Highs near 80. .WEDNESDAY NIGHT...Mostly cloudy with a slight chance of showers. Breezy with lows in the lower 70s. Chance of rain 10 percent. .THURSDAY...Partly sunny in the morning, then becoming mostly sunny. A slight chance of showers. Highs near 80. Chance of rain 10 percent. $$