Arco Weather Forecast

    • 42
    • 65

    Slight Chance Rain Showers

    • 45
    • 70

    Sunny

    • 47
    • 74

    Sunny

    • 48
    • 76

    Mostly Sunny

    • 49
    • 76

    Partly Sunny

    • 48
    • 75

    Slight Chance Rain Showers

Today 15 Sep Lost River Valleys

Sunny with a slight chance of rain Showers in the morning. Then partly sunny with a chance of rain Showers and a slight chance of Thunderstorms in the afternoon. Highs 58 to 68. Northwest Winds up to 10 Mph.

Tonight 15 Sep Lost River Valleys

Partly cloudy. Lows 36 to 45. Northwest Winds up to 10 Mph.

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Arco Temperature Statistics

September Temperature

Hailey, Friedman Memorial Airport (51 miles)

  • Lowest 12 September, 2025

    44.6 °F

  • Average September

    60.7 °F

  • Highest 3 September, 2025

    89.6 °F

Climate (2020–Present)

Hailey, Friedman Memorial Airport (51 miles)

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  • Average Low 2020–2025

    33.9 °F

  • Average 2020–2025

    42.2 °F

  • Average High 2020–2025

    55.9 °F
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