Merrimack River - Interstate 495 Bridge Weather Forecast

    • 49
    • 65

    Rain Showers

    • 48
    • 75

    Mostly Sunny

    • 50
    • 73

    Partly Sunny

    • 51
    • 71

    Slight Chance Rain Showers

    • 49
    • 79

    Mostly Sunny

    • 46
    • 69

    Mostly Sunny

Today 7 Sep Western Essex

Showers with isolated Thunderstorms this Morning, then Showers this afternoon. Patchy fog. Locally heavy rainfall possible this morning. Much cooler with Highs in the mid 60s. North Winds around 5 Mph. Chance of rain 90 percent.

Tonight 7 Sep Western Essex

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the upper 40s. West Winds around 5 Mph.

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Merrimack River - Interstate 495 Bridge Temperature Statistics

September Temperature

Lawrence Municipal Airport (3.7 miles)

  • Lowest 1 September, 2025

    52 °F

  • Average September

    65.8 °F

  • Highest 3 September, 2025

    79 °F

Climate (2020–Present)

Lawrence Municipal Airport (3.7 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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