FPUS52 KKEY 180759 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 359 AM EDT Thu Jun 18 2026 FLZ076>078-182145- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 359 AM EDT Thu Jun 18 2026 .TODAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Southeast winds near 10 mph, briefly decreasing to 5 to 10 mph in the afternoon. Chance of rain 10 percent. .TONIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 80s. Southeast winds near 10 mph. Chance of rain 10 percent. .JUNETEENTH...Mostly sunny. A slight chance of showers and thunderstorms in the morning. Highs in the upper 80s. Southeast winds 5 to 10 mph. Chance of rain 10 percent. .FRIDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the mid 80s. Southeast winds 5 to 10 mph. Chance of rain 10 percent. .SATURDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Southeast winds 5 to 10 mph. Chance of rain 10 percent. .SATURDAY NIGHT AND SUNDAY...Partly cloudy. Lows in the lower 80s. Highs in the upper 80s. .SUNDAY NIGHT AND MONDAY...Mostly clear. Lows in the lower 80s. Highs in the upper 80s. .MONDAY NIGHT...Mostly clear with a slight chance of showers. Lows in the lower 80s. Chance of rain 10 percent. .TUESDAY...Sunny. Highs near 90. .TUESDAY NIGHT...Mostly clear with a slight chance of showers. Lows in the lower 80s. Chance of rain 10 percent. .WEDNESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs near 90. Chance of rain 10 percent. $$