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National Weather Service Forecast
Forecast issued at 9:31 pm EDT Aug 20, 2026 by the National Weather Service Wilmington, OH
Hazardous Weather Outlook

Forecast Discussion for ILN NWS Office Area Forecast Discussion National Weather Service Wilmington OH 757 PM EDT Thu Aug 20 2026 .WHAT HAS CHANGED... Significant flooding is ongoing, particularly in Central Ohio. Additional river rises can also be expected in Central and Western Ohio
See Full Discussion Here
4    D A Y    F O R E C A S T    A T    A    G L A N C E
 
Tonight

Tonight: Scattered showers, mainly before 2am.  Patchy fog after 4am.  Otherwise, mostly clear, with a low around 63. Light northeast wind.  Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Scattered
Showers and
Patchy Fog
Friday

Friday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 82. Light northeast wind.
Areas Fog
then Sunny
Friday
Night
Friday Night: Mostly clear, with a low around 62. Calm wind.
Mostly Clear

Saturday

Saturday: A chance of showers and thunderstorms after 2pm.  Partly sunny, with a high near 81. Light southwest wind becoming west 6 to 11 mph in the afternoon.  Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Mostly Sunny
then Chance
T-storms
Saturday
Night
Saturday Night: A chance of showers and thunderstorms before 8pm.  Mostly clear, with a low around 59. Northwest wind 5 to 9 mph becoming light  after midnight.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Mostly Clear
Sunday

Sunday: Sunny, with a high near 77.
Sunny

Sunday
Night
Sunday Night: Mostly clear, with a low around 55.
Mostly Clear

Monday

Monday: Sunny, with a high near 76.
Sunny

Monday
Night
Monday Night: Partly cloudy, with a low around 55.
Partly Cloudy

 
Lo 63 °F Hi 82 °F Lo 62 °F Hi 81 °F Lo 59 °F Hi 77 °F Lo 55 °F Hi 76 °F Lo 55 °F
48 Hour Temperature and Dew Point Forecast
DEW POINT: 60-64=Slightly Humid, 65-69=Humid, 70-74=Very Humid, 75-79=Oppressively Humid, 80 & Greater=Very Oppressively Humid
48 hour temperature forecast
48 Hour Precipitation Potential and Sky Cover Forecast
48 hour temperature forecast
48 Hour Rain and Thunder Forecast
48 hour precipitation forecast
48 Hour Snow Freezing Rain and Sleet Forecast
48 hour forecast
48 Hour Wind Forecast
48 hour temperature forecast
 
7 DAY HOURLY FORECAST TABLES & GRAPHS
 
Tonight through Wednesday Night
 
  Tonight

Tonight: Scattered showers, mainly before 2am.  Patchy fog after 4am.  Otherwise, mostly clear, with a low around 63. Light northeast wind.  Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Scattered
Showers and
Patchy Fog
  Lo 63 °F
 
Scattered showers, mainly before 2am. Patchy fog after 4am. Otherwise, mostly clear, with a low around 63. Light northeast wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
 
 
  Friday

Friday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 82. Light northeast wind.
Areas Fog
then Sunny
  Hi 82 °F
 
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 82. Light northeast wind.
  Friday
Night
Friday Night: Mostly clear, with a low around 62. Calm wind.
Mostly Clear

  Lo 62 °F
 
Mostly clear, with a low around 62. Calm wind.
 
 
  Saturday

Saturday: A chance of showers and thunderstorms after 2pm.  Partly sunny, with a high near 81. Light southwest wind becoming west 6 to 11 mph in the afternoon.  Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Mostly Sunny
then Chance
T-storms
  Hi 81 °F
 
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Light southwest wind becoming west 6 to 11 mph in the afternoon. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
  Saturday
Night
Saturday Night: A chance of showers and thunderstorms before 8pm.  Mostly clear, with a low around 59. Northwest wind 5 to 9 mph becoming light  after midnight.  Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Chance
T-storms then
Mostly Clear
  Lo 59 °F
 
A chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 59. Northwest wind 5 to 9 mph becoming light after midnight. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
 
 
  Sunday

Sunday: Sunny, with a high near 77.
Sunny

  Hi 77 °F
 
Sunny, with a high near 77.
  Sunday
Night
Sunday Night: Mostly clear, with a low around 55.
Mostly Clear

  Lo 55 °F
 
Mostly clear, with a low around 55.
 
 
  Monday

Monday: Sunny, with a high near 76.
Sunny

  Hi 76 °F
 
Sunny, with a high near 76.
  Monday
Night
Monday Night: Partly cloudy, with a low around 55.
Partly Cloudy

  Lo 55 °F
 
Partly cloudy, with a low around 55.
 
 
  Tuesday   Sunny, with a high near 79.   Tuesday Night   Partly cloudy, with a low around 60.  
 
  Wednesday   Mostly sunny, with a high near 83.   Wednesday Night   Partly cloudy, with a low around 64.  
 
 
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