Barton Reservoir Weather Forecast

    • 22
    • 31

    Areas Fog

    • 22
    • 31

    Mostly Cloudy

    • 22
    • 32

    Partly Sunny

    • 24
    • 39

    Mostly Cloudy

    • 23
    • 41

    Chance Rain/Snow

    • 25
    • 39

    Chance Rain/Snow

    • 28
    • 40

    Chance Rain/Snow

Today 19 Jan Lower Treasure Valley

Cloudy. Areas of dense fog this Morning, then patchy fog this afternoon. Highs 28 to 33. Light Winds.

Tonight 19 Jan Lower Treasure Valley

Cloudy with occasional Flurries. Areas of fog. Lows 23 to 28. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Barton Reservoir Temperature Statistics

January Temperature

Ontario Municipal Airport (21.7 miles)

  • Lowest 11 January, 2026

    21.9 °F

  • Average January

    34 °F

  • Highest 3 January, 2026

    52 °F

Climate (2021–Present)

Ontario Municipal Airport (21.7 miles)

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  • Average Low 2021–2026

    42.8 °F

  • Average 2021–2026

    54.8 °F

  • Average High 2021–2026

    67.2 °F
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