National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

23°F

-5°C

Humidity 88%
Wind Speed Calm
Barometer 30.23 in (1023.3 mb)
Dewpoint 20°F (-7°C)
Visibility 10.00 mi
Last update 27 Dec 10:53 pm EST
Extended Forecast for

Newtown PA

  • Tonight

    Tonight: Partly cloudy, with a low around 21. Calm wind.

    Low: 21 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of rain, mainly between 3pm and 5pm. Mostly cloudy, with a high near 38. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%.

    High: 38 °F

    Partly Sunny
    then Chance
    Rain

  • Sunday Night

    Sunday Night: A chance of rain, mainly after 7pm. Cloudy, with a temperature rising to around 42 by 5am. South wind 5 to 10 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 34 °F⇑

    Chance Rain

  • Monday

    Monday: Rain, mainly before 1pm. High near 56. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 56 °F

    Rain and
    Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 26. Breezy, with a west wind around 20 mph, with gusts as high as 35 mph.

    Low: 26 °F

    Partly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 34. Breezy.

    High: 34 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 21. Calm wind.
Sunday
A chance of rain, mainly between 3pm and 5pm. Mostly cloudy, with a high near 38. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%.
Sunday Night
A chance of rain, mainly after 7pm. Cloudy, with a temperature rising to around 42 by 5am. South wind 5 to 10 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain, mainly before 1pm. High near 56. Breezy, with a southwest wind 10 to 15 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Partly cloudy, with a low around 26. Breezy, with a west wind around 20 mph, with gusts as high as 35 mph.
Tuesday
Partly sunny, with a high near 34. Breezy.
Tuesday Night
Mostly cloudy, with a low around 23.
Wednesday
Mostly sunny, with a high near 35.
Wednesday Night
Mostly cloudy, with a low around 25.
New Year's Day
A chance of snow. Mostly cloudy, with a high near 35. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 19.
Friday
Sunny, with a high near 31.
Friday Night
Partly cloudy, with a low around 18.
Saturday
Mostly sunny, with a high near 35.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newtown PA
 40.22°N 74.96°W (Elev. 98 ft)
Last Update:
4:11 pm EST Dec 27, 2025
Forecast Valid:
11pm EST Dec 27, 2025-6pm EST Jan 3, 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