Mason Weather Forecast

    • 26
    • 52

    Decreasing Clouds

    • 26
    • 40

    Mostly Sunny

    • 43
    • 49

    Mostly Cloudy

    • 44
    • 60

    Mostly Cloudy

    • 57
    • 64

    Mostly Cloudy

    • 52
    • 69

    Partly Sunny

Today 20 Dec Effingham

Mostly sunny. Not as cool with Highs in the lower 50s. West Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 20 Dec Effingham

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the mid 20s. Northwest Winds 5 to 10 Mph.

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Mason Temperature Statistics

December Temperature

Effingham, Effingham County Memorial Airport (9.3 miles)

  • Lowest 14 December, 2025

    0.9 °F

  • Average December

    28.7 °F

  • Highest 18 December, 2025

    54.3 °F

Climate (2020–Present)

Effingham, Effingham County Memorial Airport (9.3 miles)

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  • Average Low 2020–2025

    45.8 °F

  • Average 2020–2025

    55.6 °F

  • Average High 2020–2025

    65.7 °F
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