Belle Fourche Reservoir Weather Forecast

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    Mostly Cloudy

Today 19 Dec Butte

Partly cloudy in the Morning, then mostly cloudy with a slight chance of rain in the afternoon. Breezy and not as cool with Highs in the lower 50s. South Winds 10 to 20 Mph, increasing to west 20 to 30 Mph in the afternoon. Chance of rain 20 percent.

Tonight 19 Dec Butte

Mostly cloudy with snow with rain likely in the Evening, then partly cloudy with a chance of snow after midnight. Little or no snow accumulation. Lows in the lower 20s. Northwest Winds 15 to 20 Mph with Gusts up to 35 Mph. Chance of precipitation 90 percent.

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Belle Fourche Reservoir Temperature Statistics

December Temperature

Spearfish / Clyde Ice (17.4 miles)

  • Lowest 13 December, 2025

    5 °F

  • Average December

    33.5 °F

  • Highest 14 December, 2025

    60.8 °F

Climate (2020–Present)

Spearfish / Clyde Ice (17.4 miles)

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  • Average Low 2020–2025

    36.2 °F

  • Average 2020–2025

    47.6 °F

  • Average High 2020–2025

    58.3 °F
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