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.

Overcast

26°F

-3°C

Humidity 96%
Wind Speed N 5 mph
Barometer 30.08 in (1018.3 mb)
Dewpoint 25°F (-4°C)
Visibility NA
Wind Chill20°F (-7°C)
Last update 18 Jan 12:53 am EST
Extended Forecast for

Tullytown PA

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

  • Overnight

    Overnight: A chance of snow between 3am and 5am, then a chance of rain after 5am. Cloudy, with a low around 30. Calm wind. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 30 °F

    Chance
    Rain/Snow

  • Sunday

    Sunday: Snow likely, possibly mixed with rain, becoming all snow after noon. Cloudy, with a high near 34. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.

    High: 34 °F

    Rain/Snow
    Likely then
    Snow Likely

  • Sunday Night

    Sunday Night: A chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 20. West wind 5 to 10 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.

    Low: 20 °F

    Chance Snow

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 34. Southwest wind 5 to 10 mph, with gusts as high as 25 mph.

    High: 34 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 13. West wind around 10 mph, with gusts as high as 20 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 11.

    Low: 11 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A chance of snow between 3am and 5am, then a chance of rain after 5am. Cloudy, with a low around 30. Calm wind. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.
Sunday
Snow likely, possibly mixed with rain, becoming all snow after noon. Cloudy, with a high near 34. Calm wind becoming north around 5 mph in the afternoon. Chance of precipitation is 70%. New snow accumulation of 1 to 3 inches possible.
Sunday Night
A chance of snow before 1am. Cloudy, then gradually becoming partly cloudy, with a low around 20. West wind 5 to 10 mph. Chance of precipitation is 40%. New snow accumulation of less than one inch possible.
M.L.King Day
Sunny, with a high near 34. Southwest wind 5 to 10 mph, with gusts as high as 25 mph.
Monday Night
Partly cloudy, with a low around 13. West wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 23.
Tuesday Night
Mostly clear, with a low around 11.
Wednesday
Mostly sunny, with a high near 35.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
Partly sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 19.
Friday
Mostly sunny, with a high near 32.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
A chance of snow. Partly sunny, with a high near 34. Chance of precipitation is 30%.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tullytown PA
 40.12°N 74.83°W (Elev. 13 ft)
Last Update:
8:24 pm EST Jan 17, 2026
Forecast Valid:
1am EST Jan 18, 2026-6pm EST Jan 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation