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

48°F

9°C

Humidity 80%
Wind Speed N 6 mph
Barometer 30.24 in (1025.9 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 21 May 5:56 am EDT
Extended Forecast for

Mercer PA

  • Today

    Today: Mostly cloudy, with a high near 68. Northeast wind 6 to 8 mph.

    High: 68 °F

    Mostly Cloudy

  • Tonight

    Tonight: Partly cloudy, with a low around 48. East wind 6 to 9 mph.

    Low: 48 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of rain after 2pm. Partly sunny, with a high near 67. East wind 11 to 14 mph. Chance of precipitation is 20%.

    High: 67 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Friday Night

    Friday Night: Rain, mainly after 8pm. Low around 48. Southeast wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Rain Likely
    then Rain

  • Saturday

    Saturday: Rain and possibly a thunderstorm before 11am, then rain between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. High near 61. Southeast wind around 17 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 61 °F

    Showers

  • Saturday Night

    Saturday Night: Showers and possibly a thunderstorm. Low around 52. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 52 °F

    Showers

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.

    Low: 59 °F

    Showers
    Likely

  • Memorial Day

    Memorial Day: A chance of showers. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.

    High: 79 °F

    Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, with a high near 68. Northeast wind 6 to 8 mph.
Tonight
Partly cloudy, with a low around 48. East wind 6 to 9 mph.
Friday
A slight chance of rain after 2pm. Partly sunny, with a high near 67. East wind 11 to 14 mph. Chance of precipitation is 20%.
Friday Night
Rain, mainly after 8pm. Low around 48. Southeast wind 14 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Rain and possibly a thunderstorm before 11am, then rain between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. High near 61. Southeast wind around 17 mph, with gusts as high as 30 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and possibly a thunderstorm. Low around 52. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Memorial Day
A chance of showers. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around 58.
Tuesday
Mostly cloudy, with a high near 81.
Tuesday Night
Mostly cloudy, with a low around 59.
Wednesday
Partly sunny, with a high near 82.
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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:
5:11 am EDT May 21, 2026
Forecast Valid:
6am EDT May 21, 2026-6pm EDT May 27, 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