FPUS62 KKEY 210737 SFTKEY STZ000-212100- Tabular State Forecast for the Florida Keys National Weather Service Key West FL 337 AM EDT Mon Sep 21 2026 ROWS INCLUDE... Daily predominant daytime weather 6AM-6PM Forecast temperatures...early morning low/daytime high Probability of precipitation nighttime 6PM-6AM/daytime 6AM-6PM - indicates temperatures below zero MM indicates missing data FCST FCST FCST FCST FCST FCST FCST Today Tue Wed Thu Fri Sat Sun Sep 21 Sep 22 Sep 23 Sep 24 Sep 25 Sep 26 Sep 27 ...Upper Keys... Key Largo Tstrms Tstrms Tstrms Tstrms Tstrms Tstrms Tstrms /86 80/86 80/86 79/86 79/86 79/85 78/85 /50 60/70 70/80 80/70 70/60 60/70 70/60 ...Middle Keys... Marathon Tstrms Tstrms Tstrms Tstrms Tstrms Tstrms Tstrms /88 80/88 80/88 79/88 81/88 80/86 79/87 /60 60/60 70/80 80/70 60/50 50/60 60/60 ...Lower Keys... Key West Tstrms Tstrms Tstrms Tstrms Tstrms Tstrms Tstrms /89 79/90 79/89 80/90 79/90 79/88 80/89 /60 60/70 70/80 80/70 60/50 50/60 60/60 $$