Duncan Weather Forecast

    • 65
    • 77

    Slight Chance Rain Showers

    • 65
    • 78

    Mostly Cloudy

    • 67
    • 81

    Mostly Cloudy

    • 67
    • 82

    Slight Chance Rain Showers

    • 69
    • 83

    Chance Rain Showers

    • 69
    • 85

    Slight Chance Thunderstorms

Today 6 Aug Northern Spartanburg

Partly sunny. Near steady Temperatures in the mid 70s. Northeast Winds 5 to 10 Mph.

Tonight 6 Aug Northern Spartanburg

Mostly cloudy. Patchy fog after midnight. Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Duncan Temperature Statistics

August Temperature

Greer, Greenville-Spartanburg Airport (5.6 miles)

  • Lowest 3 August, 2025

    63 °F

  • Average August

    71.2 °F

  • Highest 1 August, 2025

    95.6 °F

Climate (2020–Present)

Greer, Greenville-Spartanburg Airport (5.6 miles)

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  • Average Low 2020–2025

    51.7 °F

  • Average 2020–2025

    61.8 °F

  • Average High 2020–2025

    73 °F
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