Contoocook Weather Forecast

    • 40
    • 68

    Becoming Sunny

    • 49
    • 70

    Mostly Sunny

    • 56
    • 79

    Partly Sunny

    • 56
    • 75

    Chance Rain Showers

    • 50
    • 74

    Partly Sunny

    • 49
    • 69

    Chance Rain Showers

Today 14 Sep Merrimack

Mostly sunny. Less humid with Highs in the upper 60s. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 14 Sep Merrimack

Clear. Lows in the lower 40s. Northwest Winds around 10 Mph with Gusts up to 25 Mph in the Evening, becoming light and variable.

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Contoocook Temperature Statistics

September Temperature

Concord Municipal Airport (10.6 miles)

  • Lowest 7 September, 2026

    44.7 °F

  • Average September

    66.7 °F

  • Highest 10 September, 2026

    86.6 °F

Climate (2021–2026)

Concord Municipal Airport (10.6 miles)

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  • Average Low 2021–2026

    38.2 °F

  • Average 2021–2026

    49.2 °F

  • Average High 2021–2026

    60.2 °F
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