Merrimack Weather Forecast

    • 38
    • 62

    Mostly Cloudy

    • 33
    • 64

    Partly Sunny

    • 28
    • 55

    Mostly Sunny

    • 30
    • 58

    Sunny

    • 36
    • 65

    Mostly Sunny

    • 40
    • 68

    Partly Sunny

    • 33
    • 58

    Partly Sunny

Today 21 Oct Eastern Hillsborough

Partly sunny. Highs in the lower 60s. Northeast Winds around 10 Mph.

Tonight 21 Oct Eastern Hillsborough

Partly cloudy in the Evening, then becoming cloudy. Patchy fog. Lows in the upper 30s. Light and variable Winds.

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Merrimack Temperature Statistics

October Temperature

Manchester Airport (5 miles)

  • Lowest 18 October, 2026

    28 °F

  • Average October

    54.8 °F

  • Highest 2 October, 2026

    85.6 °F

Climate (2021–2026)

Manchester Airport (5 miles)

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  • Average Low 2021–2026

    41.8 °F

  • Average 2021–2026

    51.9 °F

  • Average High 2021–2026

    61.9 °F
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