Peterson Reservoir Weather Forecast

    • -12
    • 21

    Mostly Cloudy

    • -9
    • -3

    Chance Snow

    • -5
    • 9

    Partly Sunny

    • -5
    • 10

    Mostly Sunny

    • 10
    • 33

    Partly Sunny

    • 9
    • 32

    Partly Sunny

Today 22 Jan Keya Paha

Mostly cloudy in the Morning, then becoming partly sunny. Highs in the lower 20s. Temperature falling to around 16 in the afternoon. Northwest Winds 10 to 20 Mph.

Tonight 22 Jan Keya Paha

Mostly cloudy. Lows around 12 below. North Winds 10 to 15 Mph. Wind chill Readings 20 below to 30 below zero.

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Peterson Reservoir Temperature Statistics

January Temperature

Ainsworth Regional Airport (39.8 miles)

  • Lowest 19 January, 2026

    -6.2 °F

  • Average January

    33.1 °F

  • Highest 4 January, 2026

    66.4 °F

Climate (2021–Present)

Ainsworth Regional Airport (39.8 miles)

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  • Average Low 2021–2026

    37.7 °F

  • Average 2021–2026

    49.5 °F

  • Average High 2021–2026

    62 °F
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