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

34°F

1°C

Humidity 97%
Wind Speed Calm
Barometer 29.99 in (1015.0 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Last update 12 Mar 8:53 pm EDT
Extended Forecast for

Tullytown PA

  • Tonight

    Tonight: Mostly clear, with a low around 30. West wind 5 to 10 mph.

    Low: 30 °F

    Mostly Clear

  • Friday

    Friday: Increasing clouds, with a high near 50. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon.

    High: 50 °F

    Sunny then
    Partly Sunny
    and Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 39. South wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 39 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 53. West wind around 15 mph, with gusts as high as 25 mph.

    High: 53 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 35. West wind around 5 mph becoming calm.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 55.

    High: 55 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Rain, mainly after 2am. Low around 48. Chance of precipitation is 90%.

    Low: 48 °F

    Chance Rain
    then Rain

  • Monday

    Monday: Rain. High near 66. Chance of precipitation is 100%.

    High: 66 °F

    Rain

  • Monday Night

    Monday Night: Rain likely, mainly before 2am. Mostly cloudy, with a low around 34. Chance of precipitation is 70%.

    Low: 34 °F

    Rain Likely

Detailed Forecast

Tonight
Mostly clear, with a low around 30. West wind 5 to 10 mph.
Friday
Increasing clouds, with a high near 50. Breezy, with a south wind 5 to 10 mph increasing to 15 to 20 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 39. South wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday
Sunny, with a high near 53. West wind around 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly cloudy, with a low around 35. West wind around 5 mph becoming calm.
Sunday
Mostly cloudy, with a high near 55.
Sunday Night
Rain, mainly after 2am. Low around 48. Chance of precipitation is 90%.
Monday
Rain. High near 66. Chance of precipitation is 100%.
Monday Night
Rain likely, mainly before 2am. Mostly cloudy, with a low around 34. Chance of precipitation is 70%.
Tuesday
A chance of rain before 8am. Mostly sunny, with a high near 42. Chance of precipitation is 30%.
Tuesday Night
Mostly clear, with a low around 25.
Wednesday
Mostly sunny, with a high near 40.
Wednesday Night
Partly cloudy, with a low around 28.
Thursday
Partly sunny, with a high near 47.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Tullytown PA
 40.14°N 74.83°W (Elev. 39 ft)
Last Update:
4:11 pm EDT Mar 12, 2026
Forecast Valid:
9pm EDT Mar 12, 2026-6pm EDT Mar 19, 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