Newtown Weather Forecast

    • 71
    • 90

    Chance Thunderstorms

    • 64
    • 87

    Rain Showers Likely

    • 58
    • 81

    Mostly Sunny

    • 56
    • 77

    Mostly Sunny

    • 59
    • 79

    Partly Sunny

    • 61
    • 81

    Partly Sunny

Today 3 Sep Lower Bucks

Mostly cloudy with Showers likely with a chance of Thunderstorms this Morning, then partly sunny with a slight chance of Showers and Thunderstorms this afternoon. Locally heavy rainfall possible this morning. Warmer with Highs in the upper 80s. Southwest Winds 5 to 10 Mph. Chance of rain 60 percent.

Tonight 3 Sep Lower Bucks

Mostly cloudy with a chance of Showers and Thunderstorms in the Evening, then partly cloudy with a slight chance of Showers and Thunderstorms after midnight. Humid with Lows around 70. West Winds around 5 Mph. Chance of rain 40 percent.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Newtown Temperature Statistics

September Temperature

Trenton, Mercer County Airport (6.8 miles)

  • Lowest 1 September, 2026

    71.1 °F

  • Average September

    76.9 °F

  • Highest 1 September, 2026

    88 °F

Climate (2021–2026)

Trenton, Mercer County Airport (6.8 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    64.5 °F
Get WillyWeather+ to remove ads