Rock Spring Reservoir Weather Forecast

    • 22
    • 38

    Increasing Clouds

    • 41
    • 49

    Breezy

    • 36
    • 55

    Breezy

    • 42
    • 57

    Partly Sunny

    • 40
    • 58

    Breezy

    • 35
    • 55

    Partly Sunny

Today 20 Dec Natrona County Lower Elevations

Mostly sunny and breezy. Highs around 40. West Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 20 Dec Natrona County Lower Elevations

Partly cloudy with a 30 percent chance of snow Showers. Lows in the lower 20s. North Winds around 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rock Spring Reservoir Temperature Statistics

December Temperature

Casper, Natrona County International Airport (34.8 miles)

  • Lowest 1 December, 2025

    6.1 °F

  • Average December

    36.6 °F

  • Highest 14 December, 2025

    59 °F

Climate (2020–Present)

Casper, Natrona County International Airport (34.8 miles)

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  • Average Low 2020–2025

    32.9 °F

  • Average 2020–2025

    46.9 °F

  • Average High 2020–2025

    60.4 °F
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