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

Hazardous Weather Conditions

Current conditions at

Dayton, Cox Dayton International Airport (KDAY)

Lat: 39.91°NLon: 84.22°WElev: 1007ft.

Mostly Cloudy

66°F

19°C

Humidity 50%
Wind Speed NE 12 G 20 mph
Barometer 30.15 in (1020.9 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 21 May 5:56 pm EDT
Extended Forecast for

Union OH

  • Tonight

    Tonight: Increasing clouds, with a low around 51. Northeast wind 7 to 13 mph.

    Low: 51 °F

    Increasing
    Clouds

  • Friday

    Friday: Showers likely, then showers and possibly a thunderstorm after 5pm. High near 70. East wind 8 to 11 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 70 °F

    Slight Chance
    Showers then
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 61. Southeast wind around 11 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    Showers

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 11am. High near 76. South wind 13 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Showers

  • Saturday Night

    Saturday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 59. West wind 3 to 7 mph. Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Partly Sunny
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    Showers

  • Memorial Day

    Memorial Day: A chance of showers after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 40%.

    High: 80 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers before 8pm. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.

    Low: 63 °F

    Chance
    Showers then
    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 51. Northeast wind 7 to 13 mph.
Friday
Showers likely, then showers and possibly a thunderstorm after 5pm. High near 70. East wind 8 to 11 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm. Low around 61. Southeast wind around 11 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday
Showers, with thunderstorms also possible after 11am. High near 76. South wind 13 to 15 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 59. West wind 3 to 7 mph. Chance of precipitation is 20%.
Sunday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Memorial Day
A chance of showers after 2pm. Mostly cloudy, with a high near 80. Chance of precipitation is 40%.
Monday Night
A chance of showers before 8pm. Mostly cloudy, with a low around 63. Chance of precipitation is 30%.
Tuesday
A chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 82. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
Wednesday
Showers and thunderstorms likely. Mostly cloudy, with a high near 82. Chance of precipitation is 60%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Union OH
 39.91°N 84.3°W (Elev. 899 ft)
Last Update:
4:00 pm EDT May 21, 2026
Forecast Valid:
6pm EDT May 21, 2026-6pm EDT May 28, 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