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

58°F

14°C

Humidity 78%
Wind Speed SE 6 mph
Barometer 30.11 in (1019.1 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 15 Oct 11:53 pm EDT
Extended Forecast for

Tullytown PA

  • Overnight

    Overnight: A chance of showers, then showers likely and possibly a thunderstorm after 5am. Cloudy, with a low around 56. Southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 56 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely and possibly a thunderstorm before noon, then a slight chance of showers and thunderstorms after 5pm. Cloudy through mid morning, then gradual clearing, with a high near 79. Southwest wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Showers
    Likely then
    Partly Sunny

  • Friday Night

    Friday Night: Showers and thunderstorms before 1am, then a chance of showers after 3am. Low around 48. West wind 5 to 15 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 48 °F

    Showers then
    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 55. North wind around 15 mph, with gusts as high as 25 mph.

    High: 55 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 36. North wind around 10 mph.

    Low: 36 °F

    Mostly Clear

  • Sunday

    Sunday: Patchy frost before 8am. Otherwise, sunny, with a high near 58.

    High: 58 °F

    Patchy Frost
    then Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 43.

    Low: 43 °F

    Partly Cloudy

Detailed Forecast

Overnight
A chance of showers, then showers likely and possibly a thunderstorm after 5am. Cloudy, with a low around 56. Southeast wind around 5 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Showers likely and possibly a thunderstorm before noon, then a slight chance of showers and thunderstorms after 5pm. Cloudy through mid morning, then gradual clearing, with a high near 79. Southwest wind 10 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms before 1am, then a chance of showers after 3am. Low around 48. West wind 5 to 15 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Partly sunny, with a high near 55. North wind around 15 mph, with gusts as high as 25 mph.
Saturday Night
Mostly clear, with a low around 36. North wind around 10 mph.
Sunday
Patchy frost before 8am. Otherwise, sunny, with a high near 58.
Sunday Night
Mostly clear, with a low around 40.
Monday
Sunny, with a high near 63.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 67.
Tuesday Night
Partly cloudy, with a low around 47.
Wednesday
Sunny, with a high near 67.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tullytown PA
 40.14°N 74.8°W (Elev. 16 ft)
Last Update:
4:09 pm EDT Oct 15, 2026
Forecast Valid:
12am EDT Oct 16, 2026-6pm EDT Oct 22, 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