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

Hazardous Weather Conditions

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fog/Mist

33°F

1°C

Humidity 92%
Wind Speed SW 3 mph
Barometer 30.07 in (1017.8 mb)
Dewpoint 31°F (-1°C)
Visibility 5.00 mi
Last update 17 Jan 4:53 pm EST
Extended Forecast for

Newtown PA

Winter Weather Advisory January 18, 06:00am until January 18, 08:00pm
Click here for hazard details and duration
Winter Weather Advisory

  • Tonight

    Tonight: A chance of snow, mainly after 5am. Increasing clouds, with a low around 30. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 30 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: Snow likely, mainly between 8am and 4pm. Cloudy, with a high near 34. Calm wind becoming northwest around 5 mph in the morning. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.

    High: 34 °F

    Snow Likely

  • Sunday Night

    Sunday Night: A chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 19. West wind around 10 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    Low: 19 °F

    Chance Snow

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 34. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 13. West wind 10 to 15 mph.

    Low: 13 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 23.

    High: 23 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 9.

    Low: 9 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 25 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A chance of snow, mainly after 5am. Increasing clouds, with a low around 30. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.
Sunday
Snow likely, mainly between 8am and 4pm. Cloudy, with a high near 34. Calm wind becoming northwest around 5 mph in the morning. Chance of precipitation is 70%. New snow accumulation of 2 to 4 inches possible.
Sunday Night
A chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 19. West wind around 10 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
M.L.King Day
Mostly sunny, with a high near 34. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 13. West wind 10 to 15 mph.
Tuesday
Sunny, with a high near 23.
Tuesday Night
Mostly clear, with a low around 9.
Wednesday
Mostly sunny, with a high near 34.
Wednesday Night
Mostly cloudy, with a low around 25.
Thursday
Partly sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 17.
Friday
Mostly sunny, with a high near 31.
Friday Night
Mostly cloudy, with a low around 20.
Saturday
Mostly sunny, with a high near 33.
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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:
4:12 pm EST Jan 17, 2026
Forecast Valid:
5pm EST Jan 17, 2026-6pm EST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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