Merrimac Weather Forecast

    • 58
    • 79

    Becoming Sunny

    • 45
    • 74

    Sunny

    • 43
    • 67

    Sunny

    • 47
    • 70

    Mostly Sunny

    • 57
    • 76

    Mostly Sunny

    • 59
    • 84

    Partly Sunny

Today 18 Sep Western Essex

Sunny. Near steady temperature in the upper 70s. Southwest Winds around 5 Mph.

Tonight 18 Sep Western Essex

Clear. Lows in the upper 50s. Southwest Winds around 5 Mph, becoming west after midnight.

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Merrimac Temperature Statistics

September Temperature

Lawrence Municipal Airport (9.9 miles)

  • Lowest 9 September, 2025

    48 °F

  • Average September

    63.9 °F

  • Highest 6 September, 2025

    84.9 °F

Climate (2020–Present)

Lawrence Municipal Airport (9.9 miles)

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  • Average Low 2020–2025

    43.2 °F

  • Average 2020–2025

    52.2 °F

  • Average High 2020–2025

    61.2 °F
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