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

Marysville Union County Airport (KMRT)

Lat: 40.22°NLon: 83.35°WElev: 1021ft.

Overcast

47°F

8°C

Humidity 91%
Wind Speed SW 8 mph
Barometer 29.96 in
Dewpoint 45°F (7°C)
Visibility 7.00 mi
Wind Chill43°F (6°C)
Last update 21 Nov 3:35 pm EST
Extended Forecast for

Irwin OH

  • This Afternoon

    This Afternoon: A chance of rain, mainly after 4pm. Cloudy, with a high near 53. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Chance Rain

  • Tonight

    Tonight: Rain, mainly before 5am. Low around 38. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 38 °F

    Rain

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 49. North wind 3 to 6 mph.

    High: 49 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 31. Calm wind becoming southwest around 6 mph after midnight.

    Low: 31 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 53. West wind 6 to 9 mph.

    High: 53 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 53.

    High: 53 °F

    Partly Sunny

  • Monday Night

    Monday Night: Rain, mainly after 1am. Low around 42. Chance of precipitation is 80%.

    Low: 42 °F

    Chance Rain
    then Rain

  • Tuesday

    Tuesday: Rain, mainly before 1pm. High near 58. Chance of precipitation is 80%.

    High: 58 °F

    Rain

Detailed Forecast

This Afternoon
A chance of rain, mainly after 4pm. Cloudy, with a high near 53. Calm wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Rain, mainly before 5am. Low around 38. Calm wind becoming north around 5 mph after midnight. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 49. North wind 3 to 6 mph.
Saturday Night
Partly cloudy, with a low around 31. Calm wind becoming southwest around 6 mph after midnight.
Sunday
Sunny, with a high near 53. West wind 6 to 9 mph.
Sunday Night
Mostly clear, with a low around 29.
Monday
Partly sunny, with a high near 53.
Monday Night
Rain, mainly after 1am. Low around 42. Chance of precipitation is 80%.
Tuesday
Rain, mainly before 1pm. High near 58. Chance of precipitation is 80%.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 38. Chance of precipitation is 50%.
Wednesday
Partly sunny, with a high near 47.
Wednesday Night
Mostly cloudy, with a low around 26.
Thanksgiving Day
Mostly sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 22.
Friday
Partly sunny, with a high near 37.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Irwin OH
 40.12°N 83.47°W (Elev. 997 ft)
Last Update:
12:15 pm EST Nov 21, 2025
Forecast Valid:
3pm EST Nov 21, 2025-6pm EST Nov 28, 2025
 
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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