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

Hazardous Weather Conditions

Current conditions at

New Castle Municipal Airport (KUCP)

Lat: 41.02°NLon: 80.42°WElev: 1072ft.

A Few Clouds

73°F

23°C

Humidity 53%
Wind Speed NW 3 mph
Barometer 29.99 in (1016.7 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 21 Jun 5:56 pm EDT
Extended Forecast for

Mercer PA

  • Tonight

    Tonight: Showers likely, mainly after 5am. Mostly cloudy, with a low around 56. Calm wind becoming east around 6 mph after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 56 °F

    Mostly Cloudy
    then Showers
    Likely

  • Monday

    Monday: Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. High near 72. Southeast wind 7 to 11 mph becoming southwest in the afternoon. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 72 °F

    Showers

  • Monday Night

    Monday Night: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 54. North wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Showers
    Likely then
    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 76. North wind 8 to 11 mph.

    High: 76 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 52. Northwest wind around 6 mph becoming calm in the evening.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 50%.

    High: 81 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.

    Low: 59 °F

    Chance
    T-storms

Detailed Forecast

Tonight
Showers likely, mainly after 5am. Mostly cloudy, with a low around 56. Calm wind becoming east around 6 mph after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. High near 72. Southeast wind 7 to 11 mph becoming southwest in the afternoon. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Monday Night
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 54. North wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 76. North wind 8 to 11 mph.
Tuesday Night
Mostly clear, with a low around 52. Northwest wind around 6 mph becoming calm in the evening.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Partly cloudy, with a low around 57.
Thursday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 57. Chance of precipitation is 30%.
Saturday
A chance of showers. Partly sunny, with a high near 80. Chance of precipitation is 30%.
Saturday Night
Partly cloudy, with a low around 59.
Sunday
Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer PA
 41.23°N 80.22°W (Elev. 1102 ft)
Last Update:
2:21 pm EDT Jun 21, 2026
Forecast Valid:
6pm EDT Jun 21, 2026-6pm EDT Jun 28, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation