FPUS52 KKEY 221958 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 358 PM EDT Sat Aug 22 2026 FLZ076>078-230815- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 358 PM EDT Sat Aug 22 2026 .TONIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Lows in the lower 80s. Southeast winds 5 to 10 mph. Chance of rain 20 percent. .SUNDAY AND SUNDAY NIGHT...Partly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the lower 80s. Southeast winds 5 to 10 mph. Chance of rain 20 percent. .MONDAY...Mostly sunny. Highs in the lower 90s. East winds 5 to 10 mph. .MONDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. East winds 5 to 10 mph. Chance of rain 30 percent. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 20 percent. .TUESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. Chance of rain 50 percent. .WEDNESDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 30 percent. .WEDNESDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. Chance of rain 40 percent. .THURSDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 30 percent. .THURSDAY NIGHT...Partly cloudy with a chance of showers and thunderstorms. Lows in the lower 80s. Chance of rain 40 percent. .FRIDAY...Partly sunny with a chance of showers and thunderstorms. Highs in the lower 90s. Chance of rain 30 percent. .FRIDAY NIGHT AND SATURDAY...Partly cloudy. A chance of showers and thunderstorms. Lows in the lower 80s. Highs in the lower 90s. Chance of rain 40 percent. $$