Letha Weather Forecast

    • 57
    • 89

    Decreasing Clouds

    • 61
    • 94

    Sunny

    • 63
    • 98

    Hot

    • 65
    • 101

    Hot

    • 62
    • 98

    Hot

    • 58
    • 92

    Mostly Sunny

    • 57
    • 88

    Mostly Sunny

Today 9 Aug Lower Treasure Valley

Mostly sunny. Highs 86 to 91. Northwest Winds up to 10 Mph with Gusts to 20 Mph.

Tonight 9 Aug Lower Treasure Valley

Partly cloudy. Lows 56 to 63. Northwest Winds up to 10 Mph with Gusts to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Letha Temperature Statistics

August Temperature

Caldwell - Caldwell Industrial Airport (17.4 miles)

  • Lowest 5 August, 2025

    55.9 °F

  • Average August

    75.1 °F

  • Highest 2 August, 2025

    91.9 °F

Climate (2020–Present)

Caldwell - Caldwell Industrial Airport (17.4 miles)

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  • Average Low 2020–2025

    41.4 °F

  • Average 2020–2025

    52.9 °F

  • Average High 2020–2025

    64.9 °F
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