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

25°C

77°F

Humidity 77%
Wind Speed Calm
Barometer 1015.4 mb (29.96 in)
Dewpoint 21°C (69°F)
Visibility 16 km
Heat Index26°C (79°F)
Last update 4 Sep 5:56 pm EDT
Extended Forecast for

3 Miles S Mercer PA

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 11pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 18. Northwest wind 5 to 8 km/h becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.

    Low: 18 °C

    Chance
    T-storms and
    Patchy Fog
    then Patchy
    Fog

  • Saturday

    Saturday: A slight chance of showers between 10am and 1pm. Areas of fog before 8am. Otherwise, partly sunny, with a high near 27. Light northeast wind becoming north 6 to 11 km/h in the morning. Chance of precipitation is 20%.

    High: 27 °C

    Slight Chance
    Showers and
    Areas Fog

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 13. Northeast wind 8 to 11 km/h.

    Low: 13 °C

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 26. Northeast wind 10 to 13 km/h.

    High: 26 °C

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 12. East wind 8 to 10 km/h.

    Low: 12 °C

    Mostly Clear

  • Labor Day

    Labor Day: Sunny, with a high near 26.

    High: 26 °C

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 13.

    Low: 13 °C

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 28.

    High: 28 °C

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 17.

    Low: 17 °C

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly before 11pm. Patchy fog after 11pm. Otherwise, mostly cloudy, with a low around 18. Northwest wind 5 to 8 km/h becoming calm in the evening. Chance of precipitation is 30%. New precipitation amounts between 1 and 2.5 mm, except higher amounts possible in thunderstorms.
Saturday
A slight chance of showers between 10am and 1pm. Areas of fog before 8am. Otherwise, partly sunny, with a high near 27. Light northeast wind becoming north 6 to 11 km/h in the morning. Chance of precipitation is 20%.
Saturday Night
Mostly clear, with a low around 13. Northeast wind 8 to 11 km/h.
Sunday
Sunny, with a high near 26. Northeast wind 10 to 13 km/h.
Sunday Night
Mostly clear, with a low around 12. East wind 8 to 10 km/h.
Labor Day
Sunny, with a high near 26.
Monday Night
Partly cloudy, with a low around 13.
Tuesday
Mostly sunny, with a high near 28.
Tuesday Night
Mostly cloudy, with a low around 17.
Wednesday
Partly sunny, with a high near 30.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 19. Chance of precipitation is 50%.
Thursday
A chance of showers. Partly sunny, with a high near 26. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 13.
Friday
Mostly sunny, with a high near 23.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Mercer PA
 41.18°N 80.23°W (Elev. 1083 m)
Last Update:
6:12 pm EDT Sep 4, 2026
Forecast Valid:
6pm EDT Sep 4, 2026-6pm EDT Sep 11, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation