Arco Weather Forecast

    • 41
    • 63

    Rain Showers

    • 38
    • 64

    Chance Rain Showers

    • 39
    • 66

    Mostly Sunny

    • 42
    • 72

    Mostly Sunny

    • 45
    • 76

    Partly Sunny

    • 43
    • 74

    Mostly Sunny

    • 46
    • 78

    Mostly Sunny

Today 30 May Lost River Valleys

A slight chance of rain in the morning. Then rain Showers and a chance of Thunderstorms in the afternoon. Highs 56 to 66. Northwest Winds 10 to 15 Mph.

Tonight 30 May Lost River Valleys

Mostly cloudy. A chance of rain Showers and a slight chance of Thunderstorms in the evening. Lows 38 to 45. Northwest Winds 10 to 15 Mph. Decreasing to up to 10 Mph after midnight.

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Arco Temperature Statistics

May Temperature

Hailey, Friedman Memorial Airport (51 miles)

  • Lowest 6 May, 2026

    32 °F

  • Average May

    61.7 °F

  • Highest 12 May, 2026

    84.2 °F

Climate (2021–Present)

Hailey, Friedman Memorial Airport (51 miles)

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  • Average Low 2021–2026

    34.8 °F

  • Average 2021–2026

    43.2 °F

  • Average High 2021–2026

    56.7 °F
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