Buttermilk Slough Weather Forecast

    • 36
    • 41

    Rain

    • 31
    • 50

    Mostly Cloudy

    • 32
    • 46

    Rain Likely

    • 38
    • 47

    Rain Likely

    • 37
    • 51

    Rain Likely

    • 35
    • 48

    Rain Likely

Today 5 Dec Lower Treasure Valley

Rain. Areas of fog. Chance of rain near 100 percent. Highs 40 to 47. Southeast Winds up to 10 Mph. Gusts to 20 Mph this afternoon.

Tonight 5 Dec Lower Treasure Valley

Rain, mainly in the evening. Areas of fog. Chance of rain 80 percent. Lows 35 to 41. Breezy. Southwest Winds 10 to 20 Mph with Gusts to 30 Mph.

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  • Temperature Real-Time

Buttermilk Slough Temperature Statistics

December Temperature

Ontario Municipal Airport (13 miles)

  • Lowest 1 December, 2025

    21 °F

  • Average December

    34.4 °F

  • Highest 2 December, 2025

    46.9 °F

Climate (2020–Present)

Ontario Municipal Airport (13 miles)

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  • Average Low 2020–2025

    42.7 °F

  • Average 2020–2025

    54.7 °F

  • Average High 2020–2025

    67.1 °F
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