Flat Lake Weather Forecast

    • 40
    • 64

    Partly Sunny

    • 43
    • 72

    Slight Chance Rain Showers

    • 38
    • 59

    Breezy

    • 38
    • 63

    Mostly Sunny

    • 52
    • 70

    Mostly Sunny

    • 54
    • 79

    Partly Sunny

    • 56
    • 80

    Partly Sunny

Today 3 Sep Campbell

Partly sunny. Areas of smoke. Much cooler. Near steady temperature in the lower 60s. North Winds 10 to 15 Mph.

Tonight 3 Sep Campbell

Partly cloudy. Lows around 40. Northeast Winds around 5 Mph, becoming southeast.

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Flat Lake Temperature Statistics

September Temperature

Mobridge, Mobridge Municipal Airport (31.1 miles)

  • Lowest 1 September, 2025

    57 °F

  • Average September

    69.4 °F

  • Highest 1 September, 2025

    81 °F

Climate (2020–Present)

Mobridge, Mobridge Municipal Airport (31.1 miles)

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  • Average Low 2020–2025

    35.9 °F

  • Average 2020–2025

    47.8 °F

  • Average High 2020–2025

    59.9 °F
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