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.

Fog/Mist

41°F

5°C

Humidity 96%
Wind Speed N 3 mph
Barometer 30.20 in (1022.3 mb)
Dewpoint 40°F (4°C)
Visibility 4.00 mi
Last update 5 Mar 7:53 am EST
Extended Forecast for

Newtown PA

  • Today

    Today: Rain, mainly before 2pm. Patchy fog before 1pm, then widespread fog after 2pm. High near 45. Northeast wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 45 °F

    Rain and
    Patchy Fog
    then Rain
    Likely and
    Fog

  • Tonight

    Tonight: Rain, mainly before 3am. Widespread fog, mainly after 3am. Low around 37. Northeast wind 10 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.

    Low: 37 °F

    Rain and Fog

  • Friday

    Friday: Areas of fog before 10am. Otherwise, cloudy, with a high near 45. East wind around 5 mph.

    High: 45 °F

    Areas Fog
    then Cloudy

  • Friday Night

    Friday Night: A chance of showers, mainly after 1am. Patchy fog after 1am. Otherwise, cloudy, with a low around 38. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 10am. Otherwise, cloudy, with a high near 58. Calm wind becoming south around 5 mph in the afternoon.

    High: 58 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: Showers. Low around 51. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Showers

  • Sunday

    Sunday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

Detailed Forecast

Today
Rain, mainly before 2pm. Patchy fog before 1pm, then widespread fog after 2pm. High near 45. Northeast wind 5 to 10 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Rain, mainly before 3am. Widespread fog, mainly after 3am. Low around 37. Northeast wind 10 to 15 mph. Chance of precipitation is 100%. New precipitation amounts between a half and three quarters of an inch possible.
Friday
Areas of fog before 10am. Otherwise, cloudy, with a high near 45. East wind around 5 mph.
Friday Night
A chance of showers, mainly after 1am. Patchy fog after 1am. Otherwise, cloudy, with a low around 38. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Patchy fog before 10am. Otherwise, cloudy, with a high near 58. Calm wind becoming south around 5 mph in the afternoon.
Saturday Night
Showers. Low around 51. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Partly sunny, with a high near 65.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 47.
Tuesday
Mostly sunny, with a high near 73.
Tuesday Night
Partly cloudy, with a low around 54.
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:
5:23 am EST Mar 5, 2026
Forecast Valid:
8am EST Mar 5, 2026-6pm EDT Mar 11, 2026
 
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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