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

61°F

16°C

Humidity 46%
Wind Speed Vrbl 3 mph
Barometer 30.17 in (1021.5 mb)
Dewpoint 40°F (4°C)
Visibility 10.00 mi
Last update 12 May 11:56 am EDT
Extended Forecast for

Union OH

  • This Afternoon

    This Afternoon: Sunny, with a high near 73. Southwest wind 3 to 8 mph.

    High: 73 °F

    Sunny

  • Tonight

    Tonight: Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am. Low around 59. South wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Mostly Cloudy
    then Showers

  • Wednesday

    Wednesday: A slight chance of showers between 9am and 10am. Partly sunny, with a high near 67. Breezy, with a southwest wind 14 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    Showers then
    Partly Sunny
    and Breezy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 43. Northwest wind 9 to 17 mph, with gusts as high as 31 mph.

    Low: 43 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 66. North wind 10 to 13 mph.

    High: 66 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 71.

    High: 71 °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 84. Chance of precipitation is 30%.

    High: 84 °F

    Chance
    Showers then
    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 73. Southwest wind 3 to 8 mph.
Tonight
Showers and possibly a thunderstorm, mainly before 5am, then a chance of showers and thunderstorms after 5am. Low around 59. South wind 10 to 15 mph, with gusts as high as 26 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A slight chance of showers between 9am and 10am. Partly sunny, with a high near 67. Breezy, with a southwest wind 14 to 20 mph becoming northwest in the afternoon. Winds could gust as high as 30 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 43. Northwest wind 9 to 17 mph, with gusts as high as 31 mph.
Thursday
Sunny, with a high near 66. North wind 10 to 13 mph.
Thursday Night
Mostly clear, with a low around 45.
Friday
Partly sunny, with a high near 71.
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 84. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 63.
Sunday
Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 68.
Monday
A chance of showers. Partly sunny, with a high near 88. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Union OH
 39.93°N 84.3°W (Elev. 899 ft)
Last Update:
12:12 pm EDT May 12, 2026
Forecast Valid:
12pm EDT May 12, 2026-6pm EDT May 18, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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