Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Fair

89°F

32°C

Humidity	65%
Wind Speed	Vrbl 7 mph
Barometer	29.99 in (1015.6 mb)
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	100°F (38°C)
Last update	28 Aug 3:53 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Key Colony Beach FL

This Afternoon
High: 90 °F
Chance
T-storms
Tonight
Low: 83 °F
Chance
T-storms
Saturday
High: 89 °F
Chance
T-storms
Saturday Night
Low: 83 °F
Chance
T-storms
Sunday
High: 89 °F
Chance
T-storms
Sunday Night
Low: 83 °F
Chance
T-storms
Monday
High: 90 °F
Chance
T-storms
Monday Night
Low: 84 °F
Chance
T-storms
Tuesday
High: 89 °F
T-storms
Likely

Detailed Forecast

This Afternoon

A chance of showers and thunderstorms. Sunny, with a high near 90. East wind around 5 mph. Chance of precipitation is 30%.

Tonight

A chance of showers and thunderstorms. Mostly clear, with a low around 83. East wind 5 to 10 mph. Chance of precipitation is 30%.

Saturday

A chance of showers and thunderstorms. Mostly sunny, with a high near 89. East wind 5 to 10 mph. Chance of precipitation is 40%.

Saturday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 83. East wind around 10 mph. Chance of precipitation is 40%.

Sunday

A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Southeast wind 5 to 10 mph. Chance of precipitation is 50%.

Sunday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 83. Chance of precipitation is 30%.

Monday

A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 40%.

Monday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 84. Chance of precipitation is 40%.

Tuesday

Showers and thunderstorms likely. Mostly sunny, with a high near 89. Chance of precipitation is 60%.

Tuesday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 84. Chance of precipitation is 50%.

Wednesday

Showers likely and possibly a thunderstorm. Mostly sunny, with a high near 89. Chance of precipitation is 60%.

Wednesday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 83. Chance of precipitation is 60%.

Thursday

Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Partly sunny, with a high near 89. Chance of precipitation is 60%.