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

Heavy Rainfall Across South Texas; Heat in the West

Excessive rainfall may produce locally considerable flash flooding over parts of South Texas, the western Gulf Coast, and Lower Mississippi River Valley through Thursday. Hot temperatures will persist over central and northern California and the Pacific Northwest through today. Read More >

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

57°F

14°C

Humidity 72%
Wind Speed NW 6 mph
Barometer 29.91 in (1012.2 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 16 Jun 6:53 am EDT
Extended Forecast for

Newtown PA

  • Today

    Today: Sunny, with a high near 78. West wind around 5 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 60. Southwest wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 80. Light southeast wind becoming south 5 to 10 mph in the morning. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 80 °F

    Chance
    Showers then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 66. Southeast wind around 5 mph.

    Low: 66 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 90. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 90 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 78. West wind around 5 mph.
Tonight
Increasing clouds, with a low around 60. Southwest wind around 5 mph becoming calm in the evening.
Wednesday
Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms between 3pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 80. Light southeast wind becoming south 5 to 10 mph in the morning. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Increasing clouds, with a low around 66. Southeast wind around 5 mph.
Thursday
A chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 90. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Partly cloudy, with a low around 67.
Juneteenth
Mostly sunny, with a high near 80.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 81.
Saturday Night
Clear, with a low around 60.
Sunday
Sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 62.
Monday
A chance of showers. Partly sunny, with a high near 84. Chance of precipitation is 40%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Newtown PA
 40.24°N 74.93°W (Elev. 282 ft)
Last Update:
4:07 am EDT Jun 16, 2026
Forecast Valid:
7am EDT Jun 16, 2026-6pm EDT Jun 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