Mystic River - Island End River Weather Forecast

    • 56
    • 60

    Rain Showers

    • 57
    • 62

    Rain Showers

    • 56
    • 63

    Rain Showers

    • 57
    • 66

    Mostly Cloudy

    • 58
    • 70

    Partly Sunny

    • 60
    • 73

    Partly Sunny

Today 26 Sep Suffolk

Showers, then Showers with a chance of Thunderstorms. Patchy fog. Some Thunderstorms may produce heavy rainfall. Windy. Near steady temperature in the upper 50s. Northeast Winds 25 to 30 Mph. Gusts up to 45 Mph, increasing to 55 Mph. Chance of rain near 100 percent.

Tonight 26 Sep Suffolk

Showers with isolated Thunderstorms. Patchy fog. Some Thunderstorms may produce heavy rainfall. Breezy. Near steady temperature in the mid 50s. Northeast Winds 20 to 25 Mph with Gusts up to 55 Mph. Chance of rain near 100 percent.

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Mystic River - Island End River Temperature Statistics

September Temperature

Boston, Logan International Airport (2.5 miles)

  • Lowest 24 September, 2026

    48.9 °F

  • Average September

    66.6 °F

  • Highest 10 September, 2026

    87.7 °F

Climate (2021–2026)

Boston, Logan International Airport (2.5 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    61 °F
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