Newtown Weather Forecast

    • 57
    • 80

    Partly Sunny

    • 50
    • 80

    Mostly Sunny

    • 47
    • 71

    Mostly Sunny

    • 51
    • 70

    Partly Sunny

    • 57
    • 76

    Partly Sunny

    • 59
    • 80

    Partly Sunny

Today 18 Sep Northern Fairfield

Patchy fog in the morning. Mostly cloudy with a slight chance of Showers in the Morning, then mostly sunny in the afternoon. Highs around 80. North Winds around 5 Mph, becoming west around 5 Mph in the afternoon. Chance of rain 20 percent.

Tonight 18 Sep Northern Fairfield

Mostly cloudy with a 20 percent chance of Showers. Patchy fog. Lows around 60. North Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Newtown Temperature Statistics

September Temperature

Danbury, Danbury Municipal Airport (9.3 miles)

  • Lowest 8 September, 2025

    45 °F

  • Average September

    65.3 °F

  • Highest 6 September, 2025

    84.9 °F

Climate (2020–Present)

Danbury, Danbury Municipal Airport (9.3 miles)

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

  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    53.6 °F

  • Average High 2020–2025

    63.3 °F
Get WillyWeather+ to remove ads