Mystic River - Island End River Weather Forecast

    • 48
    • 55

    Decreasing Clouds

    • 59
    • 76

    Rain Showers

    • 56
    • 86

    Mostly Sunny

    • 58
    • 76

    Mostly Sunny

    • 64
    • 90

    Partly Sunny

    • 57
    • 87

    Chance Rain Showers

    • 51
    • 68

    Slight Chance Rain Showers

Today 15 May Suffolk

Cloudy with isolated Showers. Patchy fog. Near steady temperature in the lower 50s. Northeast Winds 5 to 10 Mph. Chance of rain 20 percent.

Tonight 15 May Suffolk

Partly cloudy this Evening, then clearing. Lows in the upper 40s. North Winds 5 to 10 Mph, becoming southwest after midnight.

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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

    57.1 °F

  • Highest 5 May, 2026

    79.6 °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

    61 °F
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