Arco Weather Forecast

    • 15
    • 41

    Rain Likely

    • 17
    • 33

    Snow

    • 29
    • 38

    Rain/Snow

    • 25
    • 39

    Rain/Snow Likely

    • 28
    • 40

    Chance Rain/Snow

    • 21
    • 40

    Rain Likely

    • 22
    • 38

    Chance Snow

Today 19 Dec Lost River Valleys

Snow likely and a chance of rain in the morning. Then rain and snow in the afternoon. Very windy. Snow accumulation of 2 to 4 Inches. Highs 37 to 47. Southwest Winds 25 to 35 Mph.

Tonight 19 Dec Lost River Valleys

Mostly clear. Breezy. Much Colder. Lows 9 to 18. West Winds 15 to 25 Mph. Decreasing to 10 to 15 Mph after midnight.

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Arco Temperature Statistics

December Temperature

Hailey, Friedman Memorial Airport (51 miles)

  • Lowest 1 December, 2025

    15.8 °F

  • Average December

    32.5 °F

  • Highest 11 December, 2025

    55.4 °F

Climate (2020–Present)

Hailey, Friedman Memorial Airport (51 miles)

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  • Average Low 2020–2025

    34.2 °F

  • Average 2020–2025

    42.4 °F

  • Average High 2020–2025

    56.1 °F
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