Weather World
Upper Sugarloaf Key, FL 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Upper Sugarloaf Key, FL Weather Forecast
Upper Sugarloaf Key, FL Weather Forecast Date: 545 PM EDT Mon Sep 28 2026
The area/counties/county of: Monroe Middle Keys, including: The Communities Of Marathon and Key West.or toggle through each period.
Tonight... Mostly cloudy with a chance of showers and thunderstorms. Lows in the upper 70s. Southwest winds near 5 mph. Chance of rain 50%.
Tuesday... Showers likely with a chance of thunderstorms. Highs in the mid 80s. Southeast winds 5 to 10 mph. Chance of rain 60%.
Tuesday Night... Showers likely with a chance of thunderstorms. Lows in the upper 70s. East winds 5 to 10 mph. Chance of rain 60%.
Wednesday... Showers likely with a chance of thunderstorms. Highs in the mid 80s. East winds 10 to 15 mph. Chance of rain 70%.
Wednesday Night... Showers likely with a chance of thunderstorms. Lows in the upper 70s. East winds near 15 mph with gusts up to 25 mph. Chance of rain 70%.
Thursday... Showers likely with a chance of thunderstorms. Breezy. Highs in the upper 80s. Lows near 80. Chance of rain 70%.
Thursday Night... Showers likely with a chance of thunderstorms. Breezy. Highs in the upper 80s. Lows near 80. Chance of rain 70%.
Friday... Showers likely with a chance of thunderstorms. Breezy with highs in the upper 80s. Chance of rain 60%.
Friday Night... Mostly cloudy with a chance of showers and thunderstorms. Lows near 80. Highs in the upper 80s. Chance of rain 40%.
Saturday... Mostly cloudy with a chance of showers and thunderstorms. Lows near 80. Highs in the upper 80s. Chance of rain 40%.
Saturday Night... Mostly cloudy with a chance of showers and thunderstorms. Lows near 80. Chance of rain 30%.
Sunday... Mostly sunny with a chance of showers and thunderstorms. Highs in the upper 80s. Chance of rain 40%.
Sunday Night... Mostly cloudy with a chance of showers and thunderstorms. Lows near 80. Chance of rain 30%.
POP = Probability of Precipitation
Upper Sugarloaf Key Radar Loop
Use the map search tool if you want to place a location marker on the radar map...