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.

Fog/Mist

55°F

13°C

Humidity 100%
Wind Speed Calm
Barometer 30.11 in (1019.0 mb)
Dewpoint 55°F (13°C)
Visibility 3.00 mi
Last update 25 May 2:53 am EDT
Extended Forecast for

Tullytown PA

  • Overnight

    Overnight: A chance of showers, then showers likely and possibly a thunderstorm after 5am. Patchy fog. Otherwise, cloudy, with a low around 56. Calm wind. 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 and
    Patchy Fog

  • Memorial Day

    Memorial Day: Showers and possibly a thunderstorm before 1pm, then a slight chance of showers between 1pm and 2pm. Patchy fog before 2pm. High near 73. Calm wind becoming west around 5 mph in the morning. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 73 °F

    Showers and
    Patchy Fog
    then Chance
    Showers and
    Patchy Fog

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 60. Calm wind becoming north around 5 mph.

    Low: 60 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 82. Calm wind.

    High: 82 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 62. Calm wind.

    Low: 62 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 84.

    High: 84 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 63.

    Low: 63 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Overnight
A chance of showers, then showers likely and possibly a thunderstorm after 5am. Patchy fog. Otherwise, cloudy, with a low around 56. Calm wind. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Memorial Day
Showers and possibly a thunderstorm before 1pm, then a slight chance of showers between 1pm and 2pm. Patchy fog before 2pm. High near 73. Calm wind becoming west around 5 mph in the morning. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Mostly cloudy, with a low around 60. Calm wind becoming north around 5 mph.
Tuesday
Mostly sunny, with a high near 82. Calm wind.
Tuesday Night
Mostly cloudy, with a low around 62. Calm wind.
Wednesday
Partly sunny, with a high near 84.
Wednesday Night
Mostly cloudy, with a low around 63.
Thursday
Sunny, with a high near 78.
Thursday Night
Mostly clear, with a low around 56.
Friday
Sunny, with a high near 78.
Friday Night
Partly cloudy, with a low around 56.
Saturday
Mostly sunny, with a high near 76.
Saturday Night
Partly cloudy, with a low around 54.
Sunday
Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Tullytown PA
 40.16°N 74.82°W (Elev. 72 ft)
Last Update:
2:29 am EDT May 25, 2026
Forecast Valid:
3am EDT May 25, 2026-6pm EDT May 31, 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