Widespread Excessive Heat and Humidity in Midwest to Spread to East Coast

High pressure building across the Central and Eastern U.S. will produce a dangerous combination of heat and humidity. Heat indices from unusually high dewpoints and well above normal temperatures may reach 110 to 115 degrees. In addition, near record warm low temperatures will limit recovery from hot daytime temperatures. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73° N Lon: 81.05° W Elev: 13 ft.

Fair

90°F

32°C

Humidity	62%
Wind Speed	SE 6 mph
Barometer	30.05 in (1017.5 mb)
Dewpoint	75°F (24°C)
Visibility	10.00 mi
Heat Index	101°F (38°C)
Last update	18 Jul 4:53 pm EDT

More Information:

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

Detailed forecast for

Monroe Middle Keys

Tonight

Mostly cloudy, becoming partly cloudy. A slight chance of showers and thunderstorms. Lows in the lower 80s. East to southeast winds near 10 mph. Chance of rain 20 percent.

Friday

Mostly sunny with a slight chance of showers and thunderstorms. Highs in the lower 90s. East to southeast winds 5 to 10 mph. Chance of rain 20 percent.

Friday Night Through Saturday Night

Partly cloudy with a chance of showers and a slight chance of thunderstorms. Lows in the lower 80s. Highs in the lower 90s. East to southeast winds 5 to 10 mph. Chance of rain 30 percent.

Sunday Through Monday Night

Partly cloudy with a chance of showers and a slight chance of thunderstorms. Highs in the lower 90s. Lows in the lower 80s. Chance of rain 30 percent.

Tuesday Through Thursday

Partly cloudy with a slight chance of showers and thunderstorms. Highs in the lower 90s. Lows in the lower 80s. Chance of rain 20 percent.