Monticello Reservoir Weather Forecast

    • 27
    • 38

    Sunny

    • 34
    • 51

    Mostly Sunny

    • 40
    • 55

    Mostly Cloudy

    • 46
    • 62

    Rain Showers Likely

    • 35
    • 57

    Mostly Sunny

    • 43
    • 55

    Partly Sunny

Today 15 Dec Fairfield

Sunny, cooler with Highs in the upper 30s. North Winds around 5 Mph in the Morning, becoming light and variable.

Tonight 15 Dec Fairfield

Clear, cold with Lows in the mid 20s. Southwest Winds around 5 Mph.

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Monticello Reservoir Temperature Statistics

December Temperature

Winnsboro/Fairfield County Airport (11.8 miles)

  • Lowest 9 December, 2025

    32 °F

  • Average December

    40.1 °F

  • Highest 10 December, 2025

    55.4 °F

Climate (2020–Present)

Winnsboro/Fairfield County Airport (11.8 miles)

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  • Average Low 2020–2025

    53 °F

  • Average 2020–2025

    62.5 °F

  • Average High 2020–2025

    73.2 °F
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