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

44°F

7°C

Humidity 68%
Wind Speed N 5 mph
Barometer 30.17 in (1021.4 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 12 May 4:56 am EDT
Extended Forecast for

Union OH

  • Today

    Today: Sunny, with a high near 73. Light and variable wind becoming southwest 5 to 8 mph in the afternoon.

    High: 73 °F

    Sunny

  • Tonight

    Tonight: Showers, mainly between 2am and 5am. Low around 57. South wind 11 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Mostly Cloudy
    then Showers

  • Wednesday

    Wednesday: A slight chance of showers between 10am and noon. Partly sunny, with a high near 66. Breezy, with a northwest wind 15 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.

    High: 66 °F

    Slight Chance
    Showers then
    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 43. Northwest wind 11 to 18 mph, with gusts as high as 30 mph.

    Low: 43 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 64. North wind around 14 mph.

    High: 64 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 70.

    High: 70 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of showers after 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.

    Low: 57 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers before 8am. Mostly sunny, with a high near 83. Chance of precipitation is 30%.

    High: 83 °F

    Chance
    Showers then
    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 73. Light and variable wind becoming southwest 5 to 8 mph in the afternoon.
Tonight
Showers, mainly between 2am and 5am. Low around 57. South wind 11 to 17 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A slight chance of showers between 10am and noon. Partly sunny, with a high near 66. Breezy, with a northwest wind 15 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.
Wednesday Night
Partly cloudy, with a low around 43. Northwest wind 11 to 18 mph, with gusts as high as 30 mph.
Thursday
Mostly sunny, with a high near 64. North wind around 14 mph.
Thursday Night
Partly cloudy, with a low around 45.
Friday
Partly sunny, with a high near 70.
Friday Night
A chance of showers after 2am. Mostly cloudy, with a low around 57. Chance of precipitation is 30%.
Saturday
A chance of showers before 8am. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 62.
Sunday
Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 67.
Monday
A chance of showers. Partly sunny, with a high near 87. Breezy. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Union OH
 39.91°N 84.33°W (Elev. 906 ft)
Last Update:
4:00 am EDT May 12, 2026
Forecast Valid:
5am EDT May 12, 2026-6pm EDT May 18, 2026
 
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