FPUS52 KKEY 192015 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 415 PM EDT Mon Aug 19 2024 FLZ076>078-201215- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 415 PM EDT Mon Aug 19 2024 .TONIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 80s. Southwest winds 5 to 10 mph. Chance of rain 20 percent. .TUESDAY...Mostly sunny with a chance of showers and a slight chance of thunderstorms. Highs in the lower 90s. Southwest to west winds 5 to 10 mph. Chance of rain 30 percent. Heat index values up to 110. .TUESDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 80s. Southwest winds near 5 mph. Chance of rain 20 percent. .WEDNESDAY...Mostly sunny with a chance of showers and a slight chance of thunderstorms. Highs in the lower 90s. Southwest winds near 5 mph. Chance of rain 30 percent. Heat index values up to 109. .WEDNESDAY NIGHT...Mostly clear with a chance of showers and a slight chance of thunderstorms. Lows in the lower 80s. Light and variable winds, becoming east around 5 mph after midnight. Chance of rain 30 percent. .THURSDAY...Partly cloudy with a chance of showers and a slight chance of thunderstorms. Highs in the lower 90s. Chance of rain 40 percent. .THURSDAY NIGHT...Partly cloudy with a chance of showers and a slight chance of thunderstorms. Lows in the lower 80s. Chance of rain 30 percent. .FRIDAY THROUGH SATURDAY...Mostly cloudy with a chance of showers and a slight chance of thunderstorms. Highs near 90. Lows in the lower 80s. Chance of rain 50 percent. .SATURDAY NIGHT THROUGH MONDAY...Mostly cloudy with a chance of showers and a slight chance of thunderstorms. Lows in the lower 80s. Highs near 90. Chance of rain 40 percent. $$