Whetstone Bay Recreation Area Weather Forecast

    • 66
    • 91

    Chance Rain Showers

    • 60
    • 80

    Rain Showers Likely

    • 64
    • 87

    Mostly Sunny

    • 59
    • 85

    Rain Showers Likely

    • 57
    • 76

    Chance Thunderstorms

    • 55
    • 76

    Slight Chance Thunderstorms

Today 13 Sep Gregory

Partly sunny. Highs around 90. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 13 Sep Gregory

Mostly cloudy with a slight chance of Thunderstorms. A slight chance of Showers in the Evening, then a chance of Showers after midnight. Lows in the mid 60s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph, becoming south 5 to 10 Mph after midnight. Chance of rain 40 percent.

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Whetstone Bay Recreation Area Temperature Statistics

September Temperature

Chamberlain, Chamberlain Municipal Airport (44.1 miles)

  • Lowest 6 September, 2025

    37.8 °F

  • Average September

    64.6 °F

  • Highest 8 September, 2025

    89.1 °F

Climate (2020–Present)

Chamberlain, Chamberlain Municipal Airport (44.1 miles)

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  • Average Low 2020–2025

    36.2 °F

  • Average 2020–2025

    47.4 °F

  • Average High 2020–2025

    59.2 °F
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