FPUS52 KKEY 042000 ZFPKEY Zone Forecasts for the Florida Keys National Weather Service Key West FL 400 PM EDT Mon May 4 2026 FLZ076>078-051000- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Including the communities of Key Largo, Marathon, and Key West 400 PM EDT Mon May 4 2026 .TONIGHT...Mostly cloudy with a chance of showers and a slight chance of thunderstorms. Lows in the mid 70s. Northeast winds 5 to 10 mph, becoming variable near 5 mph after midnight. Chance of rain 30 percent. .TUESDAY...Mostly sunny with a slight chance of showers and thunderstorms. Highs in the mid 80s. Variable winds near 5 mph, becoming southwest to west in the afternoon. Chance of rain 10 percent. .TUESDAY NIGHT...Mostly cloudy with a slight chance of showers. Lows in the upper 70s. West to northwest winds 5 to 10 mph, becoming variable near 5 mph. Chance of rain 10 percent. .WEDNESDAY...Mostly sunny. Highs in the mid to upper 80s. Southeast winds 5 to 10 mph. .WEDNESDAY NIGHT...Mostly clear. Lows in the upper 70s. Southeast winds 5 to 10 mph. .THURSDAY...Mostly sunny. Highs in the mid to upper 80s. .THURSDAY NIGHT THROUGH SATURDAY...Partly cloudy. Lows in the upper 70s. Highs in the mid to upper 80s. .SATURDAY NIGHT...Mostly cloudy. Lows in the upper 70s. .SUNDAY AND SUNDAY NIGHT...Mostly cloudy. A slight chance of showers. Highs in the mid to upper 80s. Lows in the upper 70s. Chance of rain 10 percent. .MONDAY...Partly sunny with a slight chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 10 percent. $$