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

New Castle Municipal Airport (KUCP)

Lat: 41.02°NLon: 80.42°WElev: 1072ft.

Fair

59°F

15°C

Humidity 100%
Wind Speed Calm
Barometer 30.13 in (1021.4 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Last update 25 Aug 11:56 pm EDT
Extended Forecast for

Mercer PA

  • Overnight

    Overnight: Patchy fog before 3am. Otherwise, partly cloudy, with a low around 56. Calm wind.

    Low: 56 °F

    Patchy Fog

  • Wednesday

    Wednesday: Partly sunny, with a high near 81. Southeast wind 5 to 7 mph becoming south in the afternoon.

    High: 81 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Isolated showers and thunderstorms after 3am. Increasing clouds, with a low around 61. South wind around 5 mph. Chance of precipitation is 20%.

    Low: 61 °F

    Mostly Clear
    then Isolated
    T-storms

  • Thursday

    Thursday: Scattered showers and thunderstorms after 2pm. Increasing clouds, with a high near 81. West wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Mostly Sunny
    then
    Scattered
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 59. Calm wind.

    Low: 59 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog before 3am. Otherwise, partly cloudy, with a low around 56. Calm wind.
Wednesday
Partly sunny, with a high near 81. Southeast wind 5 to 7 mph becoming south in the afternoon.
Wednesday Night
Isolated showers and thunderstorms after 3am. Increasing clouds, with a low around 61. South wind around 5 mph. Chance of precipitation is 20%.
Thursday
Scattered showers and thunderstorms after 2pm. Increasing clouds, with a high near 81. West wind 5 to 8 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Partly cloudy, with a low around 59. Calm wind.
Friday
Mostly sunny, with a high near 78.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 65.
Monday
Mostly sunny, with a high near 85.
Monday Night
Mostly cloudy, with a low around 67.
Tuesday
A chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer PA
 41.23°N 80.25°W (Elev. 1234 ft)
Last Update:
12:01 am EDT Aug 26, 2026
Forecast Valid:
12am EDT Aug 26, 2026-6pm EDT Sep 1, 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