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.

Fair

41°F

5°C

Humidity 93%
Wind Speed NW 3 mph
Barometer 29.97 in (1014.2 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 9 Mar 3:53 am EDT
Extended Forecast for

Tullytown PA

  • Today

    Today: Widespread fog, mainly before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 70. Light southwest wind increasing to 5 to 10 mph in the morning.

    High: 70 °F

    Fog then
    Sunny

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, increasing clouds, with a low around 44. South wind around 5 mph becoming calm after midnight.

    Low: 44 °F

    Mostly Clear
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 74 °F

    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 51. South wind around 5 mph becoming calm.

    Low: 51 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: A chance of showers after 2pm. Partly sunny, with a high near 76. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.

    High: 76 °F

    Partly Sunny
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. Chance of precipitation is 50%.

    Low: 56 °F

    Chance
    Showers

  • Thursday

    Thursday: Rain showers likely before 2pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.

    High: 61 °F

    Showers
    Likely then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of rain and snow showers before 8pm. Mostly clear, with a low around 33. Chance of precipitation is 30%.

    Low: 33 °F

    Chance
    Rain/Snow
    then Mostly
    Clear

  • Friday

    Friday: Partly sunny, with a high near 52.

    High: 52 °F

    Partly Sunny

Detailed Forecast

Today
Widespread fog, mainly before 9am. Otherwise, partly sunny, then gradually becoming sunny, with a high near 70. Light southwest wind increasing to 5 to 10 mph in the morning.
Tonight
Patchy fog after 2am. Otherwise, increasing clouds, with a low around 44. South wind around 5 mph becoming calm after midnight.
Tuesday
Patchy fog before 8am. Otherwise, mostly cloudy through mid morning, then gradual clearing, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon.
Tuesday Night
Increasing clouds, with a low around 51. South wind around 5 mph becoming calm.
Wednesday
A chance of showers after 2pm. Partly sunny, with a high near 76. South wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 56. Chance of precipitation is 50%.
Thursday
Rain showers likely before 2pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 61. Chance of precipitation is 60%.
Thursday Night
A chance of rain and snow showers before 8pm. Mostly clear, with a low around 33. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 52.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Mostly sunny, with a high near 53.
Saturday Night
Mostly cloudy, with a low around 37.
Sunday
Cloudy, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tullytown PA
 40.14°N 74.83°W (Elev. 39 ft)
Last Update:
1:23 am EDT Mar 9, 2026
Forecast Valid:
4am EDT Mar 9, 2026-6pm EDT Mar 15, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation