Boise Weather Forecast

    • 55
    • 86

    Mostly Sunny

    • 64
    • 96

    Mostly Sunny

    • 53
    • 88

    Chance Thunderstorms

    • 51
    • 77

    Slight Chance Rain Showers

    • 48
    • 78

    Mostly Sunny

    • 45
    • 71

    Partly Sunny

Today 11 May Upper Treasure Valley

Sunny. Highs 83 to 88. Northwest Winds 10 to 15 Mph.

Tonight 11 May Upper Treasure Valley

Decreasing Clouds. Lows 49 to 55. Northwest Winds 10 to 15 Mph in the Evening, becoming light after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Boise Temperature Statistics

May Temperature

Boise Air Terminal (3.1 miles)

  • Lowest 9 May, 2026

    45 °F

  • Average May

    64.3 °F

  • Highest 3 May, 2026

    81.6 °F

Climate (2021–Present)

Boise Air Terminal (3.1 miles)

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  • Average Low 2021–2026

    44.2 °F

  • Average 2021–2026

    55 °F

  • Average High 2021–2026

    66.3 °F
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