Peterson Reservoir Weather Forecast

    • 19
    • 29

    Chance Snow

    • 28
    • 49

    Increasing Clouds

    • 24
    • 57

    Breezy

    • 18
    • 36

    Chance Rain/Snow

    • 1
    • 26

    Mostly Cloudy

    • -2
    • 13

    Mostly Cloudy

    • 5
    • 18

    Mostly Cloudy

Today 7 Dec Keya Paha

Mostly cloudy with a 40 percent chance of snow. Little or no snow accumulation. Highs in the lower 30s. Southeast Winds 10 to 15 Mph.

Tonight 7 Dec Keya Paha

Mostly clear in the Evening, then becoming partly cloudy. Lows around 20. Southwest Winds up to 10 Mph.

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  • Temperature Real-Time

Peterson Reservoir Temperature Statistics

December Temperature

Ainsworth Regional Airport (39.8 miles)

  • Lowest 1 December, 2025

    11.3 °F

  • Average December

    28.1 °F

  • Highest 5 December, 2025

    44.2 °F

Climate (2020–Present)

Ainsworth Regional Airport (39.8 miles)

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  • Average Low 2020–2025

    37.8 °F

  • Average 2020–2025

    49.4 °F

  • Average High 2020–2025

    61.8 °F
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