Mystic River - Island End River Weather Forecast

    • 9
    • 20

    Increasing Clouds

    • 13
    • 26

    Chance Snow

    • 9
    • 31

    Partly Sunny

    • 12
    • 32

    Partly Sunny

    • 12
    • 32

    Partly Sunny

    • 10
    • 29

    Partly Sunny

Today 31 Jan Suffolk

Sunny, cold with Highs around 20. Northwest Winds 5 to 10 Mph.

Tonight 31 Jan Suffolk

Mostly cloudy. A slight chance of snow after midnight. Not as cool with Lows around 10 above. North Winds 10 to 15 Mph. Gusts up to 30 Mph after midnight. Chance of snow 20 percent.

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Mystic River - Island End River Temperature Statistics

January Temperature

Boston, Logan International Airport (2.5 miles)

  • Lowest 24 January, 2026

    5.6 °F

  • Average January

    29.9 °F

  • Highest 15 January, 2026

    53.7 °F

Climate (2021–Present)

Boston, Logan International Airport (2.5 miles)

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  • Average Low 2021–2026

    46.9 °F

  • Average 2021–2026

    53.7 °F

  • Average High 2021–2026

    61 °F
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