Somerville Weather Forecast

    • 58
    • 64

    Rain Showers

    • 56
    • 62

    Rain Showers

    • 56
    • 65

    Mostly Cloudy

    • 58
    • 71

    Mostly Cloudy

    • 61
    • 76

    Partly Sunny

    • 57
    • 75

    Mostly Cloudy

Today 27 Sep Southeast Middlesex

Showers with a slight chance of Thunderstorms in the Morning, then Showers with a chance of Thunderstorms in the afternoon. Patchy fog. Breezy. Near steady temperature in the upper 50s. Northeast Winds 15 to 25 Mph with Gusts up to 45 Mph. Chance of rain near 100 percent.

Tonight 27 Sep Southeast Middlesex

Showers with a chance of Thunderstorms. Patchy fog. Locally heavy rainfall possible after midnight. Near steady temperature in the upper 50s. Northeast Winds 15 to 20 Mph. Gusts up to 35 Mph, decreasing to 25 Mph after midnight. Chance of rain near 100 percent.

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Somerville Temperature Statistics

September Temperature

Boston, Logan International Airport (4.3 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 (4.3 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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