Boise City Weather Forecast

    • 37
    • 61

    Slight Chance Rain Showers

    • 47
    • 67

    Chance Rain Showers

    • 41
    • 67

    Mostly Sunny

    • 49
    • 74

    Partly Sunny

    • 49
    • 76

    Mostly Sunny

    • 51
    • 80

    Partly Sunny

    • 48
    • 76

    Mostly Sunny

Today 18 May Upper Treasure Valley

Mostly sunny. Highs 57 to 62. Windy. Northwest Winds 20 to 30 Mph with Gusts to 45 Mph.

Tonight 18 May Upper Treasure Valley

Decreasing Clouds. Patchy frost after midnight. Lows 33 to 38. Windy. Northwest Winds 15 to 25 Mph. Gusts to 45 Mph this Evening, decreasing to 30 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Boise City Temperature Statistics

May Temperature

Boise Air Terminal (6.2 miles)

  • Lowest 6 May, 2025

    40.6 °F

  • Average May

    61.7 °F

  • Highest 9 May, 2025

    88.6 °F

Climate (2020–Present)

Boise Air Terminal (6.2 miles)

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  • Average Low 2020–2025

    43.7 °F

  • Average 2020–2025

    54.3 °F

  • Average High 2020–2025

    65.5 °F
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