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.

Fair

76°F

24°C

Humidity 85%
Wind Speed Vrbl 3 mph
Barometer 30.05 in (1017.9 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 1 Sep 10:56 pm EDT
Extended Forecast for

3 Miles WNW Mercer PA

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly between 2am and 5am. Mostly cloudy, with a low around 71. Light south wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, then gradually becoming sunny and hot, with a high near 91. Southwest wind 5 to 9 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely before 4am, then a chance of thunderstorms, mainly after 5am. Mostly cloudy, then gradually becoming mostly clear, with a low around 71. South wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Showers
    Likely then
    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 88. Southwest wind 6 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Chance
    T-storms then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 82. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Chance
    Showers then
    Chance
    T-storms

  • Friday Night

    Friday Night: A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.

    Low: 61 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny

  • Saturday Night

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

    Low: 57 °F

    Mostly Clear

Detailed Forecast

Tonight
A chance of showers and thunderstorms, mainly between 2am and 5am. Mostly cloudy, with a low around 71. Light south wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A chance of showers and thunderstorms before 11am, then a chance of showers and thunderstorms after 3pm. Mostly cloudy, then gradually becoming sunny and hot, with a high near 91. Southwest wind 5 to 9 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms likely before 4am, then a chance of thunderstorms, mainly after 5am. Mostly cloudy, then gradually becoming mostly clear, with a low around 71. South wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 88. Southwest wind 6 to 10 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 82. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of thunderstorms before 8pm. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Mostly sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 58.
Labor Day
Mostly sunny, with a high near 78.
Monday Night
Partly cloudy, with a low around 58.
Tuesday
Partly sunny, with a high near 76.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Mercer PA
 41.25°N 80.27°W (Elev. 1263 ft)
Last Update:
10:01 pm EDT Sep 1, 2026
Forecast Valid:
11pm EDT Sep 1, 2026-6pm EDT Sep 8, 2026
 
Forecast Discussion
 
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Additional Resources

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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