Fairfax Weather Forecast

    • 45
    • 52

    Rain Showers

    • 42
    • 53

    Rain Showers

    • 41
    • 56

    Slight Chance Rain

    • 28
    • 53

    Partly Sunny

    • 29
    • 51

    Mostly Sunny

    • 39
    • 58

    Partly Sunny

Today 5 Dec Allendale

Showers. Highs in the lower 50s. Light and variable Winds. Chance of rain near 100 percent.

Tonight 5 Dec Allendale

Showers likely. Lows in the mid 40s. Light and variable Winds. Chance of rain 70 percent.

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Fairfax Temperature Statistics

December Temperature

Allendale County Airport (3.1 miles)

  • Lowest 3 December, 2025

    35.6 °F

  • Average December

    48.1 °F

  • Highest 2 December, 2025

    55.4 °F

Climate (2020–Present)

Allendale County Airport (3.1 miles)

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  • Average Low 2020–2025

    55.6 °F

  • Average 2020–2025

    65.3 °F

  • Average High 2020–2025

    76.2 °F
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