Port Jefferson Weather Forecast

    • 58
    • 86

    Becoming Sunny

    • 57
    • 87

    Mostly Sunny

    • 57
    • 87

    Partly Sunny

    • 58
    • 87

    Mostly Sunny

    • 60
    • 88

    Partly Sunny

    • 59
    • 86

    Chance Rain Showers

Today 14 Sep Shelby

Partly cloudy in the Morning, then clearing. Highs in the mid 80s. Southeast Winds around 5 Mph.

Tonight 14 Sep Shelby

Partly cloudy. Lows around 60. Light and variable Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Port Jefferson Temperature Statistics

September Temperature

Bellefontaine Regional Airport (14.3 miles)

  • Lowest 8 September, 2025

    41 °F

  • Average September

    64.3 °F

  • Highest 3 September, 2025

    82.4 °F

Climate (2020–Present)

Bellefontaine Regional Airport (14.3 miles)

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

  • Average Low 2020–2025

    45.3 °F

  • Average 2020–2025

    53.7 °F

  • Average High 2020–2025

    62.3 °F
Get WillyWeather+ to remove ads