Loudon Weather Forecast

    • 11
    • 21

    Mostly Cloudy

    • 16
    • 29

    Partly Sunny

    • 19
    • 39

    Partly Sunny

    • 36
    • 43

    Rain Likely

    • 13
    • 47

    Partly Sunny

    • 23
    • 31

    Snow Showers

Today 15 Dec Merrimack

Mostly sunny this Morning, then becoming mostly cloudy. Highs around 20. Northwest Winds 10 to 15 Mph with Gusts up to 30 Mph. Wind chill Values as low as 10 below this morning.

Tonight 15 Dec Merrimack

Partly cloudy. Lows around 12. West Winds around 10 Mph with Gusts up to 20 Mph in the Evening, becoming light and variable.

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Loudon Temperature Statistics

December Temperature

Concord Municipal Airport (5.6 miles)

  • Lowest 9 December, 2025

    -8 °F

  • Average December

    22.6 °F

  • Highest 1 December, 2025

    37 °F

Climate (2020–Present)

Concord Municipal Airport (5.6 miles)

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  • Average Low 2020–2025

    38.5 °F

  • Average 2020–2025

    49.3 °F

  • Average High 2020–2025

    60.1 °F
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