Kirwin Reservoir Weather Forecast

    • 19
    • 52

    Increasing Clouds

    • 15
    • 52

    Mostly Sunny

    • 5
    • 39

    Partly Sunny

    • -1
    • 17

    Chance Snow

    • -1
    • 18

    Slight Chance Snow

    • 6
    • 30

    Mostly Sunny

Today 20 Jan Phillips

Mostly sunny. Highs in the lower 50s. Southwest Winds around 10 Mph with Gusts to around 20 Mph.

Tonight 20 Jan Phillips

Partly cloudy in the evening then becoming clear. Lows around 18. Northwest Winds 10 to 15 Mph with Gusts to around 20 Mph.

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Kirwin Reservoir Temperature Statistics

January Temperature

Hill City, Hill City Municipal Airport (41.6 miles)

  • Lowest 17 January, 2026

    5 °F

  • Average January

    38.1 °F

  • Highest 4 January, 2026

    73 °F

Climate (2021–Present)

Hill City, Hill City Municipal Airport (41.6 miles)

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  • Average Low 2021–2026

    42 °F

  • Average 2021–2026

    55.7 °F

  • Average High 2021–2026

    70 °F
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