National Weather Service Forecast for: Lancaster OH
Issued by: National Weather Service Wilmington, OH
Updated: 4:00 am EDT Jun 30, 2026
 
Today

Today: Patchy fog before 8am. Otherwise, sunny, with a high near 93. Heat index values as high as 105. Calm wind becoming southwest 5 to 8 mph in the morning.
Patchy Fog
then Sunny
 Tonight

Tonight: Mostly clear, with a low around 74. Southwest wind around 5 mph becoming calm in the evening.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 96. Heat index values as high as 106. Calm wind becoming southwest around 5 mph in the afternoon.
Sunny

 Wednesday
Night
Wednesday Night: Clear, with a low around 74. Light and variable wind.
Clear

 Thursday

Thursday: Sunny, with a high near 96. Calm wind becoming southwest around 6 mph in the afternoon.
Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 76.
Mostly Clear

 Friday

Friday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
Mostly Sunny
then Chance
T-storms
 Friday
Night
Friday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Chance
T-storms then
Partly Cloudy
 Independence
Day
Independence Day: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
Mostly Sunny
then Chance
T-storms
Hi 93 °F Lo 74 °F Hi 96 °F Lo 74 °F Hi 96 °F Lo 76 °F Hi 93 °F Lo 73 °F Hi 91 °F

Hazardous Weather Outlook
Extreme Heat Warning
 

Today
 
 Patchy fog before 8am. Otherwise, sunny, with a high near 93. Heat index values as high as 105. Calm wind becoming southwest 5 to 8 mph in the morning.
Tonight
 
 Mostly clear, with a low around 74. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
 
 Sunny, with a high near 96. Heat index values as high as 106. Calm wind becoming southwest around 5 mph in the afternoon.
Wednesday Night
 
 Clear, with a low around 74. Light and variable wind.
Thursday
 
 Sunny, with a high near 96. Calm wind becoming southwest around 6 mph in the afternoon.
Thursday Night
 
 Mostly clear, with a low around 76.
Friday
 
 A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 93. Chance of precipitation is 30%.
Friday Night
 
 A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Independence Day
 
 A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
Saturday Night
 
 A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 72. Chance of precipitation is 30%.
Sunday
 
 A chance of showers and thunderstorms. Partly sunny, with a high near 90. Chance of precipitation is 50%.
Sunday Night
 
 A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.
Monday
 
 A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Lancaster OH.