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.

Overcast

59°F

15°C

Humidity 96%
Wind Speed NE 14 mph
Barometer 29.87 in (1011.0 mb)
Dewpoint 58°F (14°C)
Visibility 9.00 mi
Last update 11 Oct 7:53 pm EDT
Extended Forecast for

Newtown PA

  • Tonight

    Tonight: Showers likely and possibly a thunderstorm. Cloudy, with a low around 58. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Showers
    Likely

  • Columbus Day

    Columbus Day: A chance of showers, mainly before 7am. Partly sunny, with a high near 75. North wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 75 °F

    Chance
    Showers then
    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 55. Northwest wind around 5 mph becoming calm in the evening.

    Low: 55 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, then gradually becoming sunny, with a high near 77. Calm wind becoming south around 5 mph in the afternoon.

    High: 77 °F

    Decreasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 63. Southwest wind around 5 mph.

    Low: 63 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 57.

    Low: 57 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: A chance of showers after 2am. Partly cloudy, with a low around 53. Chance of precipitation is 40%.

    Low: 53 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Showers likely and possibly a thunderstorm. Cloudy, with a low around 58. Northeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Columbus Day
A chance of showers, mainly before 7am. Partly sunny, with a high near 75. North wind 5 to 10 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Partly cloudy, with a low around 55. Northwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly cloudy, then gradually becoming sunny, with a high near 77. Calm wind becoming south around 5 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 63. Southwest wind around 5 mph.
Wednesday
Sunny, with a high near 79.
Wednesday Night
Mostly cloudy, with a low around 57.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
A chance of showers after 2am. Partly cloudy, with a low around 53. Chance of precipitation is 40%.
Friday
Showers likely, mainly after 8am. Mostly cloudy, with a high near 70. Chance of precipitation is 60%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 47. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 56. Breezy.
Saturday Night
Partly cloudy, with a low around 37.
Sunday
Sunny, with a high near 54.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newtown PA
 40.22°N 74.9°W (Elev. 135 ft)
Last Update:
4:10 pm EDT Oct 11, 2026
Forecast Valid:
8pm EDT Oct 11, 2026-6pm EDT Oct 18, 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