Buttermilk Slough Weather Forecast

    • 30
    • 61

    Gradual Clearing

    • 28
    • 57

    Mostly Cloudy

    • 28
    • 59

    Partly Sunny

    • 36
    • 59

    Mostly Cloudy

    • 36
    • 58

    Mostly Cloudy

    • 35
    • 58

    Chance Rain Showers

Today 26 Oct Lower Treasure Valley

Areas of frost this morning. Rain Showers likely this afternoon. Chance of rain 60 percent. Highs 59 to 64. Breezy. Southeast Winds 10 to 15 Mph this Morning, shifting to west 10 to 20 Mph this afternoon.

Tonight 26 Oct Lower Treasure Valley

Partly cloudy. Patchy fog after midnight. Lows 32 to 38. Southwest Winds 10 to 15 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Buttermilk Slough Temperature Statistics

October Temperature

Ontario Municipal Airport (13 miles)

  • Lowest 16 October, 2026

    29.6 °F

  • Average October

    57.8 °F

  • Highest 6 October, 2026

    86.6 °F

Climate (2021–2026)

Ontario Municipal Airport (13 miles)

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  • Average Low 2021–2026

    42.5 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    67.2 °F
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