South Chelmsford Weather Forecast

    • 58
    • 76

    Chance Rain Showers

    • 59
    • 73

    Rain Showers Likely

    • 61
    • 75

    Rain Showers Likely

    • 55
    • 81

    Mostly Sunny

    • 56
    • 79

    Mostly Sunny

    • 59
    • 82

    Partly Sunny

Today 21 Aug Central Middlesex County

Partly sunny with a 20 percent chance of Showers. Cooler with Highs in the mid 70s. Northeast Winds 5 to 10 Mph.

Tonight 21 Aug Central Middlesex County

Partly cloudy in the Evening, then mostly cloudy with a chance of Showers after midnight. Lows in the upper 50s. North Winds 5 to 10 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

South Chelmsford Temperature Statistics

August Temperature

Laurence G Hanscom Field Airport (8.1 miles)

  • Lowest 16 August, 2026

    50 °F

  • Average August

    74.2 °F

  • Highest 7 August, 2026

    91 °F

Climate (2021–2026)

Laurence G Hanscom Field Airport (8.1 miles)

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  • Average Low 2021–2026

    41.2 °F

  • Average 2021–2026

    51.7 °F

  • Average High 2021–2026

    61.7 °F
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