National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Rainfall Threat Continues in the Southwest on Monday; Record Warmth in the Plains and Midwest

Remnant moisture from Tropical Storm Rachel will persist over portions of the Great Basin and Southwest on Monday, bringing a potential heavy to excessive rainfall risk. Well above average and potentially record breaking temperatures will develop across the Plains and Midwest early this week, spreading into the Lower Mississippi Valley and Southeast midweek. Read More >

Hazardous Weather Conditions

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Partly Cloudy

86°F

30°C

Humidity 67%
Wind Speed E 8 mph
Barometer 29.94 in (1013.8 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 12 Oct 6:53 pm EDT
Extended Forecast for

Key Colony Beach FL

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly after 8pm. Partly cloudy, with a low around 79. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.

    Low: 79 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms. Sunny, with a high near 86. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 79. Northeast wind around 10 mph. Chance of precipitation is 30%.

    Low: 79 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Northeast wind around 10 mph. Chance of precipitation is 40%.

    High: 86 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 81. East wind around 10 mph. Chance of precipitation is 30%.

    Low: 81 °F

    Chance
    Showers

  • Thursday

    Thursday: A chance of showers and thunderstorms. Sunny, with a high near 87. Chance of precipitation is 40%.

    High: 87 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms. Mostly clear, with a low around 81. Chance of precipitation is 30%.

    Low: 81 °F

    Chance
    T-storms

  • Friday

    Friday: A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.

    High: 87 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Chance of precipitation is 30%.

    Low: 80 °F

    Chance
    T-storms

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly after 8pm. Partly cloudy, with a low around 79. Northeast wind 5 to 10 mph. Chance of precipitation is 30%.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 86. Northeast wind 5 to 10 mph. Chance of precipitation is 20%.
Tuesday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 79. Northeast wind around 10 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Northeast wind around 10 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 81. East wind around 10 mph. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Sunny, with a high near 87. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 81. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 80. Chance of precipitation is 30%.
Saturday
Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 86. Chance of precipitation is 70%.
Saturday Night
Showers and possibly a thunderstorm. Low around 79. Chance of precipitation is 80%.
Sunday
Showers and possibly a thunderstorm. High near 86. Breezy. Chance of precipitation is 80%.
Sunday Night
Showers and possibly a thunderstorm. Low around 78. Breezy. Chance of precipitation is 80%.
Monday
Showers and possibly a thunderstorm. High near 85. Breezy. Chance of precipitation is 80%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Key Colony Beach FL
 24.71°N 81.02°W (Elev. 0 ft)
Last Update:
7:15 pm EDT Oct 12, 2026
Forecast Valid:
7pm EDT Oct 12, 2026-6pm EDT Oct 19, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation