Bear Brook State Park Weather Forecast

    • 52
    • 69

    Rain Showers

    • 55
    • 75

    Mostly Sunny

    • 53
    • 76

    Partly Sunny

    • 64
    • 73

    Chance Rain Showers

    • 54
    • 77

    Partly Sunny

    • 49
    • 69

    Mostly Sunny

Today 6 Sep Merrimack

Partly sunny with isolated Showers. Highs in the upper 60s. Light and variable Winds, becoming north around 10 Mph. Chance of rain 20 percent.

Tonight 6 Sep Merrimack

Mostly clear. Isolated Showers in the evening. Lows in the lower 50s. Northwest Winds around 10 Mph in the Evening, becoming light and variable. Chance of rain 20 percent.

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Bear Brook State Park Temperature Statistics

September Temperature

Concord Municipal Airport (8.7 miles)

  • Lowest 1 September, 2026

    58.6 °F

  • Average September

    68.8 °F

  • Highest 4 September, 2026

    84 °F

Climate (2021–2026)

Concord Municipal Airport (8.7 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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