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

35°F

2°C

Humidity 78%
Wind Speed N 7 mph
Barometer 29.79 in (1008.3 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 13 Mar 11:53 pm EDT
Extended Forecast for

Tullytown PA

  • Overnight

    Overnight: Mostly clear, with a low around 39. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 53. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph.

    High: 53 °F

    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 35. Northwest wind around 5 mph becoming calm after midnight.

    Low: 35 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Cloudy, with a high near 53. Southeast wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 53 °F

    Cloudy

  • Sunday Night

    Sunday Night: Rain, mainly after 2am. Low around 46. Southeast wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 46 °F

    Chance Rain
    then Rain

  • Monday

    Monday: Showers, with thunderstorms also possible after 11am. High near 66. Breezy. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 66 °F

    Showers and
    Breezy

  • Monday Night

    Monday Night: Rain showers before 2am, then a chance of rain and snow showers. Some thunder is also possible. Low around 34. Breezy. Chance of precipitation is 90%.

    Low: 34 °F

    Breezy.
    Showers then
    Rain/Snow

  • Tuesday

    Tuesday: A chance of rain and snow showers before 8am. Partly sunny, with a high near 41. Breezy. Chance of precipitation is 30%.

    High: 41 °F

    Chance
    Rain/Snow and
    Breezy then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 39. Southwest wind 10 to 15 mph, with gusts as high as 30 mph.
Saturday
Sunny, with a high near 53. Breezy, with a west wind 15 to 20 mph, with gusts as high as 35 mph.
Saturday Night
Increasing clouds, with a low around 35. Northwest wind around 5 mph becoming calm after midnight.
Sunday
Cloudy, with a high near 53. Southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Sunday Night
Rain, mainly after 2am. Low around 46. Southeast wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers, with thunderstorms also possible after 11am. High near 66. Breezy. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Rain showers before 2am, then a chance of rain and snow showers. Some thunder is also possible. Low around 34. Breezy. Chance of precipitation is 90%.
Tuesday
A chance of rain and snow showers before 8am. Partly sunny, with a high near 41. Breezy. Chance of precipitation is 30%.
Tuesday Night
Partly cloudy, with a low around 24.
Wednesday
Partly sunny, with a high near 41.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Mostly cloudy, with a high near 50.
Thursday Night
Mostly cloudy, with a low around 36.
Friday
Cloudy, with a high near 52.
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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:
9:46 pm EDT Mar 13, 2026
Forecast Valid:
12am EDT Mar 14, 2026-6pm EDT Mar 20, 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