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.

Fair

86°F

30°C

Humidity 70%
Wind Speed NW 6 mph
Barometer 30.05 in (1017.7 mb)
Dewpoint 75°F (24°C)
Visibility 10.00 mi
Heat Index95°F (35°C)
Last update 18 Aug 11:53 pm EDT
Extended Forecast for

5 Miles WSW Long Key FL

  • Overnight

    Overnight: Mostly clear, with a low around 84. Northwest wind around 10 mph.

    Low: 84 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 90. North wind around 10 mph.

    High: 90 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 84. Northwest wind 5 to 10 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 84. West wind 5 to 10 mph becoming south after midnight.

    Low: 84 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 84.

    Low: 84 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms.  Partly cloudy, with a low around 84. Chance of precipitation is 20%.

    Low: 84 °F

    Slight Chance
    T-storms

Detailed Forecast

Overnight
Mostly clear, with a low around 84. Northwest wind around 10 mph.
Wednesday
Mostly sunny, with a high near 90. North wind around 10 mph.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 84. Northwest wind 5 to 10 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 84. West wind 5 to 10 mph becoming south after midnight.
Friday
Mostly sunny, with a high near 88.
Friday Night
Mostly clear, with a low around 84.
Saturday
Sunny, with a high near 88.
Saturday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 84. Chance of precipitation is 20%.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 83. Chance of precipitation is 20%.
Monday
Sunny, with a high near 89.
Monday Night
A chance of showers and thunderstorms. Mostly clear, with a low around 83. Chance of precipitation is 30%.
Tuesday
A slight chance of showers and thunderstorms. Sunny, with a high near 89. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WSW Long Key FL
 24.79°N 80.89°W (Elev. 0 ft)
12:17 am EDT Aug 19, 2026
12am EDT Aug 19, 2026-6pm EDT Aug 25, 2026
 
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Additional Resources

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