National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Lancaster, Lancaster Airport (KLNS)

Lat: 40.12°NLon: 76.29°WElev: 397ft.

Fair

95°F

35°C

Humidity 51%
Wind Speed W 12 mph
Barometer 30.10 in (1018.8 mb)
Dewpoint 74°F (23°C)
Visibility 10.00 mi
Heat Index106°F (41°C)
Last update 23 Jun 3:53 pm EDT
Extended Forecast for

Cornwall PA

Extreme Heat Warning June 23, 04:06pm until June 25, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning June 23, 04:06pm until June 25, 08:00pm

    NOW until 8:00pm Wed

    Extreme Heat Warning

  • Tonight

    Low: 76 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 97. Heat index values as high as 104. Northwest wind 3 to 6 mph.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 76. Northwest wind around 5 mph.

    Low: 76 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 94. Heat index values as high as 102. Northwest wind 3 to 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 94 °F

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 74. Northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 74 °F

    Chance
    T-storms

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 2am, then a chance of showers. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.

    Low: 70 °F

    T-storms
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 40%.

    High: 81 °F

    Mostly Cloudy
    then Chance
    T-storms

Detailed Forecast

Tonight
Mostly clear, with a low around 76. West wind 3 to 6 mph.
Tuesday
Sunny and hot, with a high near 97. Heat index values as high as 104. Northwest wind 3 to 6 mph.
Tuesday Night
Mostly clear, with a low around 76. Northwest wind around 5 mph.
Wednesday
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 94. Heat index values as high as 102. Northwest wind 3 to 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 74. Northwest wind around 6 mph becoming calm in the evening. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and thunderstorms likely, mainly after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms likely before 2am, then a chance of showers. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 50%.
Saturday
A chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 85. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 72. Chance of precipitation is 30%.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Cornwall PA
 40.27°N 76.41°W (Elev. 633 ft)
Last Update:
1:12 pm EDT Jun 23, 2025
Forecast Valid:
4pm EDT Jun 23, 2025-6pm EDT Jun 30, 2025
 
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