Deer Flat National Wildlife Refuge Weather Forecast

    • 48
    • 66

    Sunny

    • 49
    • 71

    Mostly Sunny

    • 55
    • 74

    Mostly Sunny

    • 58
    • 79

    Partly Sunny

    • 53
    • 72

    Partly Sunny

    • 50
    • 67

    Partly Sunny

    • 48
    • 62

    Mostly Sunny

Today 7 Sep Lower Treasure Valley

Areas of fog this morning. Sunny. Highs 67 to 72. West Winds up to 10 Mph.

Tonight 7 Sep Lower Treasure Valley

Mostly clear. Areas of fog. Lows 44 to 49. East Winds up to 10 Mph.

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Deer Flat National Wildlife Refuge Temperature Statistics

September Temperature

Caldwell - Caldwell Industrial Airport (6.2 miles)

  • Lowest 4 September, 2026

    46.9 °F

  • Average September

    62.8 °F

  • Highest 1 September, 2026

    84 °F

Climate (2021–2026)

Caldwell - Caldwell Industrial Airport (6.2 miles)

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  • Average Low 2021–2026

    42 °F

  • Average 2021–2026

    53.4 °F

  • Average High 2021–2026

    65.3 °F
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