Thunderstorms and Heavy Rain in the Mid-South; Heat Continues in the Southeast and Southwest

Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >

Current conditions at

The Florida Keys - Marathon International Airport (KMTH)

Lat: 24.73°NLon: 81.05°WElev: 13ft.

Partly Cloudy

88°F

31°C

Humidity 75%
Wind Speed Vrbl 7 mph
Barometer 30.04 in (1017.0 mb)
Dewpoint 79°F (26°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 19 Aug 10:53 am EDT
Extended Forecast for

2 Miles SW Long Key FL

  • Today

    Today: Mostly sunny, with a high near 90. West wind around 10 mph.

    High: 90 °F

    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 84. West wind 5 to 15 mph.  Chance of precipitation is 20%.

    Low: 84 °F

    Slight Chance
    T-storms

  • Thursday

    Thursday: Mostly sunny, with a high near 88. Southwest wind around 5 mph.

    High: 88 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 83. West wind 5 to 10 mph becoming south after midnight.

    Low: 83 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 88. South wind around 5 mph.

    High: 88 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 83.

    Low: 83 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers.  Partly cloudy, with a low around 83. Chance of precipitation is 10%.

    Low: 83 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers.  Mostly sunny, with a high near 88. Chance of precipitation is 10%.

    High: 88 °F

    Slight Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 90. West wind around 10 mph.
Tonight
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 84. West wind 5 to 15 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 88. Southwest wind around 5 mph.
Thursday Night
Mostly cloudy, with a low around 83. West wind 5 to 10 mph becoming south after midnight.
Friday
Mostly sunny, with a high near 88. South wind around 5 mph.
Friday Night
Mostly clear, with a low around 83.
Saturday
Sunny, with a high near 88.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 83. Chance of precipitation is 10%.
Sunday
A slight chance of showers. Mostly sunny, with a high near 88. Chance of precipitation is 10%.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 84. Chance of precipitation is 20%.
Monday
Sunny, with a high near 88.
Monday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 84. Chance of precipitation is 30%.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 88. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Long Key FL
 24.81°N 80.83°W (Elev. 0 ft)
11:15 am EDT Aug 19, 2026
11am EDT Aug 19, 2026-6pm EDT Aug 25, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

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