Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

Dayton, Cox Dayton International Airport (KDAY)

Lat: 39.91°NLon: 84.22°WElev: 1007ft.

Mostly Cloudy

80°F

27°C

Humidity 82%
Wind Speed SW 8 mph
Barometer 30.11 in (1018.4 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 30 Jun 8:56 am EDT
Extended Forecast for

Union OHSimilar City Names

Extreme Heat Warning until July 2, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning until July 2, 08:00pm

    NOW until 8:00pm Thu

    Extreme Heat Warning

  • Today

    High: 93 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 73. Southwest wind 5 to 8 mph.

    Low: 73 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95. Heat index values as high as 106. Southwest wind 5 to 8 mph.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 73. Southwest wind around 6 mph.

    Low: 73 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 95. Calm wind becoming southwest 5 to 9 mph in the morning.

    High: 95 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Friday

    Friday: A chance of showers and thunderstorms.  Partly sunny, with a high near 92. Chance of precipitation is 40%.

    High: 92 °F

    Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 73.

    Low: 73 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 93. Heat index values as high as 105. Southwest wind 7 to 11 mph.
Tonight
Mostly clear, with a low around 73. Southwest wind 5 to 8 mph.
Wednesday
Sunny, with a high near 95. Heat index values as high as 106. Southwest wind 5 to 8 mph.
Wednesday Night
Clear, with a low around 73. Southwest wind around 6 mph.
Thursday
Sunny, with a high near 95. Calm wind becoming southwest 5 to 9 mph in the morning.
Thursday Night
Mostly clear, with a low around 74.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 92. Chance of precipitation is 40%.
Friday Night
Partly cloudy, with a low around 73.
Independence Day
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Union OHSimilar City Names
 39.91°N 84.3°W (Elev. 899 ft)
6:05 am EDT Jun 30, 2026
9am EDT Jun 30, 2026-6pm EDT Jul 6, 2026
 
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