Steffan Reservoir Weather Forecast

    • 43
    • 63

    Decreasing Clouds

    • 52
    • 81

    Partly Sunny

    • 24
    • 64

    Breezy

    • 27
    • 49

    Mostly Sunny

    • 40
    • 62

    Partly Sunny

    • 45
    • 70

    Mostly Cloudy

Today 24 Mar Knox

Mostly cloudy in the Morning, then becoming partly sunny. Warmer with Highs in the mid 60s. South Winds 10 to 15 Mph.

Tonight 24 Mar Knox

Partly cloudy. Not as cool with Lows in the lower 40s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph, becoming south after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Steffan Reservoir Temperature Statistics

March Temperature

Yankton, Chan Gurney Municipal Airport (11.2 miles)

  • Lowest 16 March, 2026

    1.9 °F

  • Average March

    41.8 °F

  • Highest 21 March, 2026

    91.9 °F

Climate (2021–Present)

Yankton, Chan Gurney Municipal Airport (11.2 miles)

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  • Average Low 2021–2026

    39.3 °F

  • Average 2021–2026

    50.4 °F

  • Average High 2021–2026

    61.7 °F
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