Lake Massasecum Weather Forecast

    • 51
    • 75

    Rain Showers

    • 49
    • 78

    Mostly Sunny

    • 50
    • 79

    Mostly Sunny

    • 51
    • 82

    Mostly Sunny

    • 52
    • 83

    Partly Sunny

    • 54
    • 81

    Partly Sunny

    • 50
    • 82

    Partly Sunny

Today 13 Sep Merrimack

Partly sunny with isolated Showers. Highs in the lower 70s. Light and variable Winds. Chance of rain 20 percent.

Tonight 13 Sep Merrimack

Partly cloudy with isolated Showers. Patchy fog after midnight. Lows in the lower 50s. Light and variable Winds. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Massasecum Temperature Statistics

September Temperature

Concord Municipal Airport (20.5 miles)

  • Lowest 9 September, 2025

    41 °F

  • Average September

    63.5 °F

  • Highest 6 September, 2025

    82.9 °F

Climate (2020–Present)

Concord Municipal Airport (20.5 miles)

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  • Average Low 2020–2025

    38.6 °F

  • Average 2020–2025

    49.3 °F

  • Average High 2020–2025

    60.1 °F
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