Letha Weather Forecast

    • 36
    • 63

    Becoming Sunny

    • 41
    • 67

    Mostly Sunny

    • 42
    • 71

    Mostly Sunny

    • 46
    • 74

    Mostly Sunny

    • 48
    • 79

    Mostly Sunny

    • 51
    • 80

    Mostly Cloudy

Today 27 Apr Lower Treasure Valley

Sunny. Highs 59 to 64. Northwest Winds 10 to 15 Mph.

Tonight 27 Apr Lower Treasure Valley

Partly cloudy in the Evening, then clearing. Areas of fog after midnight. Lows 35 to 40. Northwest Winds up to 10 Mph.

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Letha Temperature Statistics

April Temperature

Caldwell - Caldwell Industrial Airport (17.4 miles)

  • Lowest 17 April, 2026

    27 °F

  • Average April

    50.9 °F

  • Highest 6 April, 2026

    75 °F

Climate (2021–Present)

Caldwell - Caldwell Industrial Airport (17.4 miles)

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  • Average Low 2021–2026

    42 °F

  • Average 2021–2026

    53.5 °F

  • Average High 2021–2026

    65.4 °F
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