National Weather Service Forecast for: Dayton OH
Issued by: National Weather Service Wilmington, OH
Updated: 2:28 am EDT Jun 30, 2026
 
Overnight

Overnight: Partly cloudy, with a low around 75. Light south wind.
Partly Cloudy
Tuesday

Tuesday: Sunny, with a high near 95. Heat index values as high as 106. Southwest wind 5 to 10 mph.
Sunny
Tuesday
Night
Tuesday Night: Mostly clear, with a low around 75. Southwest wind 3 to 8 mph.
Mostly Clear
Wednesday

Wednesday: Sunny and hot, with a high near 97. Heat index values as high as 109. Southwest wind 3 to 8 mph.
Hot
Wednesday
Night
Wednesday Night: Clear, with a low around 75. Southwest wind around 6 mph becoming calm  in the evening.
Clear
Thursday

Thursday: Sunny, with a high near 96.
Sunny
Thursday
Night
Thursday Night: Mostly clear, with a low around 76.
Mostly Clear
Friday

Friday: A chance of showers and thunderstorms.  Mostly sunny, with a high near 93. Chance of precipitation is 40%.
Chance
T-storms
Friday
Night
Friday Night: Mostly cloudy, with a low around 75.
Mostly Cloudy
Lo 75 °F Hi 95 °F Lo 75 °F Hi 97 °F Lo 75 °F Hi 96 °F Lo 76 °F Hi 93 °F Lo 75 °F

Hazardous Weather Outlook
Extreme Heat Warning
 

Overnight
 
Partly cloudy, with a low around 75. Light south wind.
Tuesday
 
Sunny, with a high near 95. Heat index values as high as 106. Southwest wind 5 to 10 mph.
Tuesday Night
 
Mostly clear, with a low around 75. Southwest wind 3 to 8 mph.
Wednesday
 
Sunny and hot, with a high near 97. Heat index values as high as 109. Southwest wind 3 to 8 mph.
Wednesday Night
 
Clear, with a low around 75. Southwest wind around 6 mph becoming calm in the evening.
Thursday
 
Sunny, with a high near 96.
Thursday Night
 
Mostly clear, with a low around 76.
Friday
 
A chance of showers and thunderstorms. Mostly sunny, with a high near 93. Chance of precipitation is 40%.
Friday Night
 
Mostly cloudy, with a low around 75.
Independence Day
 
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 94. Chance of precipitation is 40%.
Saturday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Chance of precipitation is 40%.
Sunday
 
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
Sunday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.
Monday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 90. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Dayton OH.