Big Trinity Lake Weather Forecast

    • 29
    • 40

    Becoming Sunny

    • 32
    • 48

    Mostly Sunny

    • 34
    • 55

    Mostly Sunny

    • 36
    • 53

    Mostly Sunny

    • 36
    • 53

    Partly Sunny

    • 28
    • 53

    Mostly Cloudy

    • 25
    • 44

    Mostly Cloudy

Today 16 Mar Boise Mountains

Partly cloudy. A slight chance of snow this Morning, then a slight chance of rain this afternoon. Chance of precipitation 20 percent. Not as cool with Highs 48 to 61.

Tonight 16 Mar Boise Mountains

Decreasing Clouds. Lows 26 to 41.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Trinity Lake Temperature Statistics

March Temperature

Boise Air Terminal (40.4 miles)

  • Lowest 11 March, 2026

    30 °F

  • Average March

    46.6 °F

  • Highest 8 March, 2026

    64.9 °F

Climate (2021–Present)

Boise Air Terminal (40.4 miles)

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  • Average Low 2021–2026

    44.1 °F

  • Average 2021–2026

    54.9 °F

  • Average High 2021–2026

    66.1 °F
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