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.

Overcast

54°F

12°C

Humidity 67%
Wind Speed Vrbl 3 mph
Barometer 30.05 in (1018.8 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 16 May 7:56 am EDT
Extended Forecast for

3 Miles S Mercer PA

  • Today

    Today: A chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 78. South wind 8 to 14 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 78 °F

    Mostly Sunny
    then Showers
    Likely

  • Tonight

    Tonight: Showers and thunderstorms before 4am, then a slight chance of showers between 4am and 5am. Low around 59. Southwest wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 59 °F

    Showers then
    Slight Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%.

    High: 81 °F

    Mostly Cloudy
    then Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 8pm. Mostly cloudy during the early evening, then becoming clear, with a low around 62. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    Showers then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 88. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.

    High: 88 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 50%.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms, then showers likely after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.

    Low: 66 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday

    Wednesday: Showers likely, then showers and possibly a thunderstorm after 8am. High near 79. Chance of precipitation is 80%.

    High: 79 °F

    Showers

Detailed Forecast

Today
A chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Increasing clouds, with a high near 78. South wind 8 to 14 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms before 4am, then a slight chance of showers between 4am and 5am. Low around 59. Southwest wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A slight chance of showers between noon and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 81. Calm wind becoming south around 6 mph in the afternoon. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy during the early evening, then becoming clear, with a low around 62. Calm wind becoming southeast around 5 mph after midnight. Chance of precipitation is 30%.
Monday
Sunny, with a high near 88. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms, then showers likely after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 70%.
Wednesday
Showers likely, then showers and possibly a thunderstorm after 8am. High near 79. Chance of precipitation is 80%.
Wednesday Night
Showers likely before 8pm. Mostly cloudy, with a low around 48. Chance of precipitation is 60%.
Thursday
Partly sunny, with a high near 66.
Thursday Night
Partly cloudy, with a low around 47.
Friday
Mostly sunny, with a high near 72.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Mercer PA
 41.18°N 80.25°W (Elev. 1171 ft)
Last Update:
6:35 am EDT May 16, 2026
Forecast Valid:
8am EDT May 16, 2026-6pm EDT May 22, 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