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Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Current conditions at

Chillicothe Ross County Airport (KRZT)

Lat: 39.44°NLon: 83.02°WElev: 725ft.

Mostly Cloudy

70°F

21°C

Humidity 94%
Wind Speed SW 9 mph
Barometer 29.67 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 18 Jun 7:55 am EDT
Extended Forecast for

Chillicothe OH

Flood Advisory June 18, 08:21am until June 18, 08:30am
Click here for hazard details and duration
...
  •  
    Flood Advisory June 18, 08:21am until June 18, 08:30am

    NOW until 8:30am Thu

    Flood Advisory

  • Today

    High: 84 °F

    Slight Chance
    T-storms then
    Chance
    Showers

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 58. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Chance
    Showers then
    Partly Cloudy

  • Juneteenth

    Juneteenth: Sunny, with a high near 79. Light northwest wind increasing to 5 to 10 mph in the afternoon.

    High: 79 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57. Northwest wind around 6 mph becoming calm in the evening.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 82. Light west wind increasing to 6 to 11 mph in the afternoon. Chance of precipitation is 20%.

    High: 82 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.

    High: 84 °F

    Mostly Sunny
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers after 2am. Low around 64. Chance of precipitation is 90%.

    Low: 64 °F

    Showers
    Likely then
    Showers

Detailed Forecast

Today
A slight chance of showers and thunderstorms before 4pm, then a chance of showers between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Increasing clouds, with a high near 84. West wind 11 to 15 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
A chance of showers and thunderstorms, mainly before 7pm. Mostly cloudy, then gradually becoming mostly clear, with a low around 58. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Juneteenth
Sunny, with a high near 79. Light northwest wind increasing to 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 57. Northwest wind around 6 mph becoming calm in the evening.
Saturday
A slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 82. Light west wind increasing to 6 to 11 mph in the afternoon. Chance of precipitation is 20%.
Saturday Night
Partly cloudy, with a low around 61.
Sunday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers after 2am. Low around 64. Chance of precipitation is 90%.
Monday
Showers, mainly before 2pm. High near 78. Chance of precipitation is 80%.
Monday Night
A chance of showers before 8pm. Partly cloudy, with a low around 57. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 57.
Wednesday
Sunny, with a high near 82.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Chillicothe OH
 39.34°N 82.99°W (Elev. 656 ft)
Last Update:
4:00 am EDT Jun 18, 2026
Forecast Valid:
8am EDT Jun 18, 2026-6pm EDT Jun 24, 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