Lexington Weather Forecast

    • 60
    • 79

    Slight Chance Rain Showers

    • 48
    • 78

    Mostly Sunny

    • 43
    • 68

    Mostly Sunny

    • 51
    • 71

    Partly Sunny

    • 57
    • 77

    Mostly Sunny

    • 61
    • 81

    Partly Sunny

Today 18 Sep Southeast Middlesex

Mostly cloudy with a chance of Showers in the Morning, then mostly sunny in the afternoon. Highs in the upper 70s. North Winds around 5 Mph, becoming west in the afternoon. Chance of rain 40 percent.

Tonight 18 Sep Southeast Middlesex

Mostly cloudy with a chance of Showers with isolated Thunderstorms. Near steady temperature around 60. North Winds around 5 Mph. Chance of rain 50 percent.

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Lexington Temperature Statistics

September Temperature

Laurence G Hanscom Field Airport (3.7 miles)

  • Lowest 9 September, 2025

    43 °F

  • Average September

    63.1 °F

  • Highest 6 September, 2025

    86 °F

Climate (2020–Present)

Laurence G Hanscom Field Airport (3.7 miles)

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  • Average Low 2020–2025

    41.7 °F

  • Average 2020–2025

    51.9 °F

  • Average High 2020–2025

    62 °F
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