Merrimack River - Interstate 495 Bridge Weather Forecast

    • 69
    • 78

    Rain Showers Likely

    • 58
    • 84

    Partly Sunny

    • 53
    • 75

    Sunny

    • 60
    • 76

    Chance Rain Showers

    • 63
    • 78

    Chance Rain Showers

    • 57
    • 80

    Partly Sunny

    • 64
    • 79

    Partly Sunny

Today 9 Sep Western Essex

Mostly cloudy with a 20 percent chance of Showers. Near steady temperature in the mid 70s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 9 Sep Western Essex

Mostly cloudy. A chance of Showers with a slight chance of Thunderstorms this Evening, then Showers likely with a slight chance of Thunderstorms after midnight. Patchy fog after midnight. Not as cool with Lows in the upper 60s. Southwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Chance of rain 70 percent.

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Merrimack River - Interstate 495 Bridge Temperature Statistics

September Temperature

Lawrence Municipal Airport (3.7 miles)

  • Lowest 7 September, 2026

    52 °F

  • Average September

    66.3 °F

  • Highest 4 September, 2026

    82.9 °F

Climate (2021–2026)

Lawrence Municipal Airport (3.7 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    60.9 °F
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