Mystic River - Island End River Weather Forecast

    • 46
    • 70

    Rain

    • 45
    • 54

    Rain Likely

    • 52
    • 71

    Chance Rain Showers

    • 49
    • 65

    Chance Rain Showers

    • 50
    • 67

    Chance Rain Showers

    • 53
    • 68

    Chance Rain Showers

    • 60
    • 77

    Partly Sunny

Today 29 May Suffolk

Mostly cloudy with a 50 percent chance of Showers. Near steady temperature in the upper 60s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 29 May Suffolk

Rain. Lows in the mid 40s. South Winds 5 to 10 Mph, becoming west after midnight. Gusts up to 25 Mph. Chance of rain 90 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Mystic River - Island End River Temperature Statistics

May Temperature

Boston, Logan International Airport (2.5 miles)

  • Lowest 9 May, 2026

    42.7 °F

  • Average May

    61.7 °F

  • Highest 19 May, 2026

    96.7 °F

Climate (2021–Present)

Boston, Logan International Airport (2.5 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    53.6 °F

  • Average High 2021–2026

    60.9 °F
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