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

71°F

22°C

Humidity 100%
Wind Speed Calm
Barometer 30.06 in (1018.3 mb)
Dewpoint 71°F (22°C)
Visibility 9.00 mi
Last update 2 Sep 2:56 am EDT
Extended Forecast for

Mercer PA

  • Overnight

    Overnight: A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Calm wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Chance
    T-storms

  • Wednesday

    Wednesday: Showers and thunderstorms likely before 11am, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91. Light southwest wind increasing to 5 to 9 mph in the morning. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Showers
    Likely then
    Slight Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 71. South wind around 6 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 88. Southwest wind 6 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: 88 °F

    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 68. Light northwest wind. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Chance
    T-storms then
    Showers
    Likely

  • Friday

    Friday: Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 82. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Showers
    Likely then
    Chance
    T-storms

  • Friday Night

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

    Low: 61 °F

    Chance
    T-storms then
    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Calm wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Showers and thunderstorms likely before 11am, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 91. Light southwest wind increasing to 5 to 9 mph in the morning. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A chance of showers and thunderstorms, mainly after 4am. Mostly cloudy, with a low around 71. South wind around 6 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers and thunderstorms, mainly after 2pm. Partly sunny, with a high near 88. Southwest wind 6 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.
Thursday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2am. Mostly cloudy, with a low around 68. Light northwest wind. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 82. Chance of precipitation is 60%. 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. Partly cloudy, with a low around 61. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 79.
Saturday Night
Mostly clear, with a low around 54.
Sunday
Sunny, with a high near 78.
Sunday Night
Partly cloudy, with a low around 55.
Labor Day
Mostly sunny, with a high near 80.
Monday Night
Mostly cloudy, with a low around 58.
Tuesday
Partly sunny, with a high near 79.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mercer PA
 41.23°N 80.25°W (Elev. 1234 ft)
Last Update:
2:56 am EDT Sep 2, 2026
Forecast Valid:
3am EDT Sep 2, 2026-6pm EDT Sep 8, 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