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.

Clear

70°F

21°C

Humidity 33%
Wind Speed W 8 mph
Barometer 29.98 in
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 9 Mar 2:53 pm EDT
Extended Forecast for

Newtown PA

  • Tonight

    Tonight: Increasing clouds, with a low around 43. Southwest wind 5 to 10 mph becoming light after midnight.

    Low: 43 °F

    Increasing
    Clouds

  • Tuesday

    Tuesday: Patchy fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 73. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 73 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 51. South wind around 5 mph becoming calm.

    Low: 51 °F

    Mostly Clear

  • Wednesday

    Wednesday: A slight chance of showers after 2pm. Mostly cloudy, with a high near 73. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 73 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers likely after 2am. Mostly cloudy, with a low around 53. South wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Showers
    Likely

  • Thursday

    Thursday: Rain showers likely before 2pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 58. Breezy. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Breezy.
    Showers
    Likely then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of rain and snow showers before 8pm. Mostly clear, with a low around 30. Chance of precipitation is 30%.

    Low: 30 °F

    Chance
    Rain/Snow
    then Mostly
    Clear

  • Friday

    Friday: Partly sunny, with a high near 49.

    High: 49 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of showers between 8pm and 2am. Partly cloudy, with a low around 39. Chance of precipitation is 30%.

    Low: 39 °F

    Chance
    Showers

Detailed Forecast

Tonight
Increasing clouds, with a low around 43. Southwest wind 5 to 10 mph becoming light after midnight.
Tuesday
Patchy fog before 9am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 73. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 51. South wind around 5 mph becoming calm.
Wednesday
A slight chance of showers after 2pm. Mostly cloudy, with a high near 73. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers and thunderstorms before 8pm, then showers likely and possibly a thunderstorm between 8pm and 2am, then showers likely after 2am. Mostly cloudy, with a low around 53. South wind 10 to 15 mph. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Rain showers likely before 2pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 58. Breezy. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A chance of rain and snow showers before 8pm. Mostly clear, with a low around 30. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 49.
Friday Night
A chance of showers between 8pm and 2am. Partly cloudy, with a low around 39. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 50.
Saturday Night
Mostly cloudy, with a low around 35.
Sunday
Cloudy, with a high near 55.
Sunday Night
Showers likely. Cloudy, with a low around 47. Chance of precipitation is 60%.
Monday
Showers likely. Mostly cloudy, with a high near 54. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Newtown PA
 40.22°N 74.96°W (Elev. 98 ft)
Last Update:
6:15 am EDT Mar 9, 2026
Forecast Valid:
3pm EDT Mar 9, 2026-6pm EDT Mar 16, 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