Sumter Weather Forecast

    • 28
    • 44

    Chance Rain

    • 32
    • 46

    Mostly Sunny

    • 40
    • 59

    Mostly Sunny

    • 41
    • 60

    Mostly Cloudy

    • 31
    • 55

    Slight Chance Rain

    • 23
    • 46

    Mostly Sunny

Today 8 Dec Sumter

Cloudy. A chance of rain in the morning. Patchy fog in the morning. Highs in the mid 40s. North Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 8 Dec Sumter

Mostly cloudy in the Evening, then becoming partly cloudy. Patchy fog in the evening. Lows in the upper 20s. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Sumter Temperature Statistics

December Temperature

Sumter Airport (5 miles)

  • Lowest 4 December, 2025

    28.4 °F

  • Average December

    44.6 °F

  • Highest 4 December, 2025

    53.6 °F

Climate (2020–Present)

Sumter Airport (5 miles)

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  • Average Low 2020–2025

    52.7 °F

  • Average 2020–2025

    63.8 °F

  • Average High 2020–2025

    75.7 °F
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