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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Sunday could bring areas of flooding to parts of the upper Midwest, central Great Lakes, southern New England and Virginia/North Carolina tidewater region. Read More >

Hazardous Weather Conditions

Current conditions at

Urbana Grimes Field (KI74)

Lat: 40.13°NLon: 83.75°WElev: 1067ft.

Fog/Mist

72°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 30.19 in
Dewpoint 72°F (22°C)
Visibility 4.00 mi
Last update 18 Sep 3:35 am EDT
Extended Forecast for

3 Miles NNW Mechanicsburg OH

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm before 4am, then a chance of showers and thunderstorms after 4am. Some of the storms could produce heavy rainfall. Cloudy, with a low around 67. Light northeast wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 67 °F

    Heavy Rain

  • Friday

    Friday: Cloudy, then gradually becoming mostly sunny, with a high near 75. Northeast wind around 9 mph.

    High: 75 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 56. Northeast wind 5 to 9 mph.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: A slight chance of showers, with thunderstorms also possible after 5pm. Mostly sunny, with a high near 79. Light and variable wind becoming southeast around 6 mph in the morning. Chance of precipitation is 20%.

    High: 79 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Low around 65. Light and variable wind becoming south around 5 mph after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 65 °F

    Showers

  • Sunday

    Sunday: Showers and possibly a thunderstorm before 8am, then showers likely between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 79. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 79 °F

    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am, then a chance of showers and thunderstorms after 2am. Low around 58. Chance of precipitation is 80%.

    Low: 58 °F

    Showers

  • Monday

    Monday: A chance of showers and thunderstorms. Mostly cloudy, with a high near 69. Chance of precipitation is 50%.

    High: 69 °F

    Chance
    T-storms

  • Monday Night

    Monday Night: Showers likely, mainly after 2am. Cloudy, with a low around 55. Chance of precipitation is 60%.

    Low: 55 °F

    Showers
    Likely

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm before 4am, then a chance of showers and thunderstorms after 4am. Some of the storms could produce heavy rainfall. Cloudy, with a low around 67. Light northeast wind. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Friday
Cloudy, then gradually becoming mostly sunny, with a high near 75. Northeast wind around 9 mph.
Friday Night
Mostly clear, with a low around 56. Northeast wind 5 to 9 mph.
Saturday
A slight chance of showers, with thunderstorms also possible after 5pm. Mostly sunny, with a high near 79. Light and variable wind becoming southeast around 6 mph in the morning. Chance of precipitation is 20%.
Saturday Night
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 11pm. Low around 65. Light and variable wind becoming south around 5 mph after midnight. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Showers and possibly a thunderstorm before 8am, then showers likely between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 79. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am, then a chance of showers and thunderstorms after 2am. Low around 58. Chance of precipitation is 80%.
Monday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 69. Chance of precipitation is 50%.
Monday Night
Showers likely, mainly after 2am. Cloudy, with a low around 55. Chance of precipitation is 60%.
Tuesday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 68. Chance of precipitation is 60%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 55. Chance of precipitation is 30%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 68. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Thursday
Mostly cloudy, with a high near 68.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Mechanicsburg OH
 40.13°N 83.59°W (Elev. 1198 ft)
Last Update:
2:16 am EDT Sep 18, 2026
Forecast Valid:
3am EDT Sep 18, 2026-6pm EDT Sep 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