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 with Haze

45°F

7°C

Humidity 83%
Wind Speed Calm
Barometer 30.26 in (1024.1 mb)
Dewpoint 40°F (4°C)
Visibility 6.00 mi
Last update 4 Mar 6:53 pm EST
Extended Forecast for

Newtown PA

  • Tonight

    Tonight: A slight chance of rain before 1am, then a chance of rain after 3am. Patchy fog after 11pm. Otherwise, cloudy, with a low around 40. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Chance Rain
    and Patchy
    Fog

  • Thursday

    Thursday: Rain, mainly before 3pm. Areas of fog before 2pm. High near 47. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 47 °F

    Rain and
    Areas Fog

  • Thursday Night

    Thursday Night: Rain, mainly after 7pm. Low around 37. Northeast wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Rain

  • Friday

    Friday: A slight chance of showers before 1pm. Cloudy, with a high near 46. Northeast wind around 5 mph. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers, mainly after 1am. Cloudy, with a low around 38. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.

    Low: 38 °F

    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers after 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 20%.

    High: 62 °F

    Cloudy then
    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly before 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.

    Low: 49 °F

    Showers
    Likely

  • Sunday

    Sunday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of rain before 1am, then a chance of rain after 3am. Patchy fog after 11pm. Otherwise, cloudy, with a low around 40. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain, mainly before 3pm. Areas of fog before 2pm. High near 47. Calm wind becoming east around 5 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
Rain, mainly after 7pm. Low around 37. Northeast wind around 5 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A slight chance of showers before 1pm. Cloudy, with a high near 46. Northeast wind around 5 mph. Chance of precipitation is 20%.
Friday Night
A chance of showers, mainly after 1am. Cloudy, with a low around 38. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%.
Saturday
A slight chance of showers after 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 20%.
Saturday Night
Showers likely, mainly before 1am. Mostly cloudy, with a low around 49. Chance of precipitation is 70%.
Sunday
Partly sunny, with a high near 65.
Sunday Night
Partly cloudy, with a low around 45.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 48.
Tuesday
Mostly sunny, with a high near 72.
Tuesday Night
A chance of showers. Partly cloudy, with a low around 58. Chance of precipitation is 30%.
Wednesday
A chance of showers. Partly sunny, with a high near 75. Chance of precipitation is 30%.
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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:
4:10 pm EST Mar 4, 2026
Forecast Valid:
7pm EST Mar 4, 2026-6pm EDT Mar 11, 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