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

Harry Clever Field Airport (KPHD)

Lat: 40.47°NLon: 81.42°WElev: 894ft.

Overcast

70°F

21°C

Humidity 93%
Wind Speed N 5 mph
Barometer 30.19 in (1021.8 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 18 Sep 6:53 am EDT
Extended Forecast for

Dennison OH

  • Today

    Today: Cloudy through mid morning, then gradual clearing, with a high near 76. Calm wind becoming north around 6 mph in the morning.

    High: 76 °F

    Gradual
    Clearing

  • Tonight

    Tonight: Mostly clear, with a low around 56. North wind around 6 mph becoming calm after midnight.

    Low: 56 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 78. Light east wind.

    High: 78 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: A chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then showers and possibly a thunderstorm after 2am. Patchy fog between 10pm and 3am. Low around 64. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Chance
    Showers and
    Patchy Fog
    then Showers
    and Patchy
    Fog

  • Sunday

    Sunday: Showers, with thunderstorms also possible after 11am. High near 76. Light and variable wind becoming west around 5 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    High: 76 °F

    Showers

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers. Mostly cloudy, with a high near 69. Chance of precipitation is 40%.

    High: 69 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers, then showers likely and possibly a thunderstorm after 2am. Cloudy, with a low around 58. Chance of precipitation is 60%.

    Low: 58 °F

    Showers
    Likely

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm. Cloudy, with a high near 68. Chance of precipitation is 60%.

    High: 68 °F

    Showers
    Likely

Detailed Forecast

Today
Cloudy through mid morning, then gradual clearing, with a high near 76. Calm wind becoming north around 6 mph in the morning.
Tonight
Mostly clear, with a low around 56. North wind around 6 mph becoming calm after midnight.
Saturday
Mostly sunny, with a high near 78. Light east wind.
Saturday Night
A chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then showers and possibly a thunderstorm after 2am. Patchy fog between 10pm and 3am. Low around 64. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
Showers, with thunderstorms also possible after 11am. High near 76. Light and variable wind becoming west around 5 mph in the morning. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers. Mostly cloudy, with a high near 69. Chance of precipitation is 40%.
Monday Night
A chance of showers, then showers likely and possibly a thunderstorm after 2am. Cloudy, with a low around 58. Chance of precipitation is 60%.
Tuesday
Showers likely and possibly a thunderstorm. Cloudy, with a high near 68. Chance of precipitation is 60%.
Tuesday Night
Showers likely. Mostly cloudy, with a low around 56. Chance of precipitation is 70%.
Wednesday
Showers likely. Mostly cloudy, with a high near 67. Chance of precipitation is 60%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 50%.
Thursday
Mostly cloudy, with a high near 68.
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ABOUT THIS FORECAST

 
Point Forecast:
Dennison OH
 40.41°N 81.32°W (Elev. 1047 ft)
Last Update:
2:22 am EDT Sep 18, 2026
Forecast Valid:
6am 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