Downtown (Boston) Weather Forecast

    • 66
    • 79

    Rain Showers Likely

    • 54
    • 76

    Mostly Sunny

    • 55
    • 64

    Partly Sunny

    • 56
    • 64

    Rain Showers Likely

    • 56
    • 63

    Chance Rain Showers

    • 55
    • 63

    Slight Chance Rain Showers

Today 17 Sep Suffolk

Partly sunny in the Morning, then mostly cloudy with a slight chance of Showers in the afternoon. Humid with Highs in the upper 70s. South Winds around 5 Mph. Chance of rain 20 percent.

Tonight 17 Sep Suffolk

Cloudy with a 50 percent chance of Showers. Humid with Lows in the mid 60s. South Winds 5 to 10 Mph, becoming southwest after midnight.

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Downtown (Boston) Temperature Statistics

September Temperature

Boston, Logan International Airport (1.9 miles)

  • Lowest 12 September, 2026

    56.6 °F

  • Average September

    69.8 °F

  • Highest 10 September, 2026

    87.7 °F

Climate (2021–2026)

Boston, Logan International Airport (1.9 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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