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

65°F

18°C

Humidity 90%
Wind Speed NW 8 mph
Barometer 30.06 in (1017.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 20 May 11:53 pm EDT
Extended Forecast for

Newtown PA

  • Overnight

    Overnight: A chance of showers, mainly after 3am. Cloudy, with a low around 54. North wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 54 °F

    Chance
    Showers

  • Thursday

    Thursday: Showers and thunderstorms before noon, then showers likely. High near 63. Northeast wind around 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 63 °F

    Showers

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 51. East wind around 5 mph becoming calm in the evening.

    Low: 51 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 65. East wind around 10 mph.

    High: 65 °F

    Partly Sunny

  • Friday Night

    Friday Night: Showers likely, mainly after 2am. Cloudy, with a low around 47. East wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Chance
    Showers then
    Showers
    Likely

  • Saturday

    Saturday: Showers. High near 59. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 59 °F

    Showers

  • Saturday Night

    Saturday Night: Showers. Low around 49. Chance of precipitation is 90%.

    Low: 49 °F

    Showers

  • Sunday

    Sunday: A chance of showers. Cloudy, with a high near 69. Chance of precipitation is 50%.

    High: 69 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of showers. Cloudy, with a low around 55. Chance of precipitation is 40%.

    Low: 55 °F

    Chance
    Showers

Detailed Forecast

Overnight
A chance of showers, mainly after 3am. Cloudy, with a low around 54. North wind around 5 mph. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Showers and thunderstorms before noon, then showers likely. High near 63. Northeast wind around 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Partly cloudy, with a low around 51. East wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 65. East wind around 10 mph.
Friday Night
Showers likely, mainly after 2am. Cloudy, with a low around 47. East wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Showers. High near 59. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Showers. Low around 49. Chance of precipitation is 90%.
Sunday
A chance of showers. Cloudy, with a high near 69. Chance of precipitation is 50%.
Sunday Night
A chance of showers. Cloudy, with a low around 55. Chance of precipitation is 40%.
Memorial Day
A chance of showers. Mostly cloudy, with a high near 76. Chance of precipitation is 40%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 30%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 80. Chance of precipitation is 30%.
Tuesday Night
Mostly cloudy, with a low around 60.
Wednesday
Partly sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newtown PA
 40.22°N 74.9°W (Elev. 135 ft)
Last Update:
7:43 pm EDT May 20, 2026
Forecast Valid:
12am EDT May 21, 2026-6pm EDT May 27, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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