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

Lancaster, Lancaster Airport (KLNS)

Lat: 40.12°NLon: 76.29°WElev: 397ft.

Fair

79°F

26°C

Humidity 60%
Wind Speed Calm
Barometer 29.91 in (1012.5 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 12 Aug 10:53 am EDT
Extended Forecast for

Cornwall PA

  • Today

    Today: Mostly sunny, with a high near 85. West wind 3 to 5 mph.

    High: 85 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 69. Southwest wind 3 to 5 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 86. West wind 5 to 8 mph.

    High: 86 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 67. West wind around 5 mph becoming light and variable in the evening.

    Low: 67 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. North wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Friday Night

    Friday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 50%.

    High: 83 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly sunny, with a high near 85. West wind 3 to 5 mph.
Tonight
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 69. Southwest wind 3 to 5 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Partly sunny, with a high near 86. West wind 5 to 8 mph.
Thursday Night
Mostly cloudy, with a low around 67. West wind around 5 mph becoming light and variable in the evening.
Friday
A slight chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 84. North wind 3 to 6 mph. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 62.
Saturday
Sunny, with a high near 82.
Saturday Night
Partly cloudy, with a low around 62.
Sunday
A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 50%.
Sunday Night
Showers likely before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Mostly cloudy, with a low around 68. Chance of precipitation is 70%.
Monday
A chance of showers. Mostly sunny, with a high near 83. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 64.
Tuesday
Sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cornwall PA
 40.27°N 76.41°W (Elev. 633 ft)
Last Update:
8:41 am EDT Aug 12, 2026
Forecast Valid:
11am EDT Aug 12, 2026-6pm EDT Aug 18, 2026
 
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