Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Current conditions at

Lancaster, Lancaster Airport (KLNS)

Lat: 40.12°NLon: 76.29°WElev: 397ft.

Overcast

76°F

24°C

Humidity 69%
Wind Speed S 5 mph
Barometer 30.05 in (1017.0 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 1 Jul 12:53 am EDT
Extended Forecast for

Lancaster Airport PA

Heat Advisory July 3, 08:00pm until July 4, 08:00pm
Extreme Heat Warning July 1, 12:00pm until July 3, 08:00pm
Click here for hazard details and duration
Heat Advisory
Extreme Heat Warning
  • Overnight

    Overnight: Partly cloudy, with a low around 70. South wind around 8 mph.

    Low: 70 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny and hot, with a high near 98. Heat index values as high as 109. West wind 5 to 7 mph.

    High: 98 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 75. South wind 5 to 8 mph becoming calm  after midnight.

    Low: 75 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 102. Heat index values as high as 109. Calm wind becoming west 5 to 7 mph in the morning.

    High: 102 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 77. West wind 3 to 7 mph.

    Low: 77 °F

    Clear

  • Friday

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

    High: 103 °F

    Hot

  • Friday Night

    Friday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

  • Independence Day

    Independence Day: A chance of showers and thunderstorms after 2pm.  Mostly sunny and hot, with a high near 99. Chance of precipitation is 30%.

    High: 99 °F

    Sunny then
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 2am.  Mostly cloudy, with a low around 73. Chance of precipitation is 50%.

    Low: 73 °F

    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 70. South wind around 8 mph.
Wednesday
Sunny and hot, with a high near 98. Heat index values as high as 109. West wind 5 to 7 mph.
Wednesday Night
Mostly clear, with a low around 75. South wind 5 to 8 mph becoming calm after midnight.
Thursday
Sunny and hot, with a high near 102. Heat index values as high as 109. Calm wind becoming west 5 to 7 mph in the morning.
Thursday Night
Clear, with a low around 77. West wind 3 to 7 mph.
Friday
Sunny and hot, with a high near 103.
Friday Night
Partly cloudy, with a low around 75.
Independence Day
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 99. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 50%.
Sunday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny and hot, with a high near 96. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 91. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 88. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Lancaster Airport PA
 40.13°N 76.29°W (Elev. 397 ft)
1:21 am EDT Jul 1, 2026
1am EDT Jul 1, 2026-6pm EDT Jul 7, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database