Northern Island Weather Forecast

    • 21
    • 29

    Increasing Clouds

    • 25
    • 40

    Chance Rain/Snow

    • 18
    • 33

    Chance Snow

    • 11
    • 25

    Mostly Sunny

    • 28
    • 34

    Chance Snow

    • 36
    • 44

    Rain Likely

Today 5 Dec Knox

Mostly sunny. Highs in the lower 20s. Light and variable Winds.

Tonight 5 Dec Knox

Partly cloudy. Lows 10 to 16. Light and variable Winds.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Northern Island Temperature Statistics

December Temperature

Rockland, Knox County Regional Airport (8.1 miles)

  • Lowest 2 December, 2025

    21 °F

  • Average December

    31.8 °F

  • Highest 1 December, 2025

    41 °F

Climate (2020–Present)

Rockland, Knox County Regional Airport (8.1 miles)

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

  • Average Low 2020–2025

    39.9 °F

  • Average 2020–2025

    48 °F

  • Average High 2020–2025

    55.2 °F
Get WillyWeather+ to remove ads