National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

62°F

17°C

Humidity 93%
Wind Speed Calm
Barometer 30.13 in (1019.5 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Last update 18 May 4:53 am EDT
Extended Forecast for

Newtown PA

Heat Advisory May 18, 12:00pm until May 19, 08:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: Sunny, with a high near 94. Light south wind becoming southwest 5 to 10 mph in the afternoon.

    High: 94 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 70. Southwest wind 5 to 10 mph.

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 97. Southwest wind 5 to 10 mph.

    High: 97 °F

    Hot

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 75. Southwest wind around 10 mph.

    Low: 75 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm after 2pm. High near 94. West wind 5 to 15 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 94 °F

    Sunny then
    Showers

  • Wednesday Night

    Wednesday Night: Showers, mainly before 8pm. Low around 56. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 56 °F

    Showers then
    Chance
    Showers

  • Thursday

    Thursday: Partly sunny, with a high near 71.

    High: 71 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 51.

    Low: 51 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 67. Chance of precipitation is 40%.

    High: 67 °F

    Chance
    Showers

Detailed Forecast

Today
Sunny, with a high near 94. Light south wind becoming southwest 5 to 10 mph in the afternoon.
Tonight
Mostly clear, with a low around 70. Southwest wind 5 to 10 mph.
Tuesday
Mostly sunny and hot, with a high near 97. Southwest wind 5 to 10 mph.
Tuesday Night
Partly cloudy, with a low around 75. Southwest wind around 10 mph.
Wednesday
Showers and possibly a thunderstorm after 2pm. High near 94. West wind 5 to 15 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers, mainly before 8pm. Low around 56. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Partly sunny, with a high near 71.
Thursday Night
Mostly cloudy, with a low around 51.
Friday
A chance of showers. Mostly cloudy, with a high near 67. Chance of precipitation is 40%.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.
Saturday
Showers likely. Cloudy, with a high near 69. Chance of precipitation is 70%.
Saturday Night
Showers likely. Cloudy, with a low around 55. Chance of precipitation is 60%.
Sunday
A chance of showers. Mostly cloudy, with a high near 73. Chance of precipitation is 50%.
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 74.93°W (Elev. 164 ft)
Last Update:
4:09 am EDT May 18, 2026
Forecast Valid:
5am EDT May 18, 2026-6pm EDT May 24, 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