National Weather Service Forecast for: Lancaster PA
Issued by: National Weather Service State College, PA
Updated: 2:21 am EDT Jun 30, 2026
 
Overnight

Overnight: Mostly clear, with a low around 67. Light south wind.
Mostly Clear

Tuesday

Tuesday: Sunny, with a high near 91. Light southwest wind becoming south 5 to 10 mph in the morning.
Sunny

Tuesday
Night
Tuesday Night: Partly cloudy, with a low around 71. South wind 7 to 10 mph, with gusts as high as 20 mph.
Partly Cloudy

Wednesday

Wednesday: Isolated showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 98. Heat index values as high as 109. Southwest wind 3 to 7 mph.  Chance of precipitation is 20%.
Mostly Sunny
then Isolated
T-storms
Wednesday
Night
Wednesday Night: Mostly clear, with a low around 76. South wind 3 to 8 mph.
Mostly Clear

Thursday

Thursday: Sunny and hot, with a high near 102.
Hot

Thursday
Night
Thursday Night: Clear, with a low around 78.
Clear

Friday

Friday: Sunny and hot, with a high near 103.
Hot

Friday
Night
Friday Night: A chance of showers and thunderstorms before 2am.  Partly cloudy, with a low around 76. Chance of precipitation is 30%.
Chance
T-storms
Lo 67 °F Hi 91 °F Lo 71 °F Hi 98 °F Lo 76 °F Hi 102 °F Lo 78 °F Hi 103 °F Lo 76 °F

Extreme Heat Watch
 

Overnight
 
Mostly clear, with a low around 67. Light south wind.
Tuesday
 
Sunny, with a high near 91. Light southwest wind becoming south 5 to 10 mph in the morning.
Tuesday Night
 
Partly cloudy, with a low around 71. South wind 7 to 10 mph, with gusts as high as 20 mph.
Wednesday
 
Isolated showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 109. Southwest wind 3 to 7 mph. Chance of precipitation is 20%.
Wednesday Night
 
Mostly clear, with a low around 76. South wind 3 to 8 mph.
Thursday
 
Sunny and hot, with a high near 102.
Thursday Night
 
Clear, with a low around 78.
Friday
 
Sunny and hot, with a high near 103.
Friday Night
 
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 76. Chance of precipitation is 30%.
Independence Day
 
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 100. Chance of precipitation is 50%.
Saturday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 72. Chance of precipitation is 30%.
Sunday
 
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 95. Chance of precipitation is 40%.
Sunday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.
Monday
 
A chance of showers and thunderstorms. Partly sunny, with a high near 91. Chance of precipitation is 40%.

 

Forecast from NOAA-NWS for Lancaster PA.