Mystic River - Island End River Weather Forecast

    • 49
    • 62

    Mostly Cloudy

    • 49
    • 62

    Cloudy

    • 53
    • 53

    Rain

    • 55
    • 71

    Chance Rain Showers

    • 58
    • 79

    Partly Sunny

    • 55
    • 80

    Slight Chance Rain Showers

    • 52
    • 69

    Partly Sunny

Today 22 May Suffolk

Partly sunny. Near steady temperature in the upper 50s. East Winds 5 to 10 Mph.

Tonight 22 May Suffolk

Mostly cloudy. Lows in the upper 40s. Southeast Winds around 5 Mph, becoming west around 5 Mph 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

    60.8 °F

  • Highest 19 May, 2026

    96.1 °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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