National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Dayton, Cox Dayton International Airport (KDAY)

Lat: 39.91°NLon: 84.22°WElev: 1007ft.

A Few Clouds

70°F

21°C

Humidity 55%
Wind Speed NE 9 mph
Barometer 30.28 in (1024.9 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 1 Aug 7:56 pm EDT
Extended Forecast for

Union OH

  • Tonight

    Tonight: Mostly clear, with a low around 55. Northeast wind 7 to 11 mph.

    Low: 55 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 78. Northeast wind 8 to 11 mph.

    High: 78 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55. Northeast wind 6 to 9 mph.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 82. East wind 6 to 9 mph.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 61. East wind around 6 mph.

    Low: 61 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84. Chance of precipitation is 20%.

    High: 84 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 64.

    Low: 64 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 30%.

    High: 84 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 65. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 55. Northeast wind 7 to 11 mph.
Saturday
Mostly sunny, with a high near 78. Northeast wind 8 to 11 mph.
Saturday Night
Mostly clear, with a low around 55. Northeast wind 6 to 9 mph.
Sunday
Sunny, with a high near 82. East wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 61. East wind around 6 mph.
Monday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, with a low around 64.
Tuesday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Union OH
 39.91°N 84.3°W (Elev. 899 ft)
Last Update:
6:53 pm EDT Aug 1, 2025
Forecast Valid:
8pm EDT Aug 1, 2025-6pm EDT Aug 8, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation