Big Trinity Lake Weather Forecast

    • 33
    • 48

    Mostly Cloudy

    • 35
    • 50

    Partly Sunny

    • 21
    • 47

    Breezy

    • 20
    • 37

    Breezy

    • 28
    • 46

    Mostly Cloudy

    • 34
    • 53

    Partly Sunny

    • 34
    • 54

    Partly Sunny

Today 23 Mar Boise Mountains

Partly sunny. Highs 52 to 66.

Tonight 23 Mar Boise Mountains

Mostly cloudy. Lows 31 to 46.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Trinity Lake Temperature Statistics

March Temperature

Boise Air Terminal (40.4 miles)

  • Lowest 15 March, 2026

    25.6 °F

  • Average March

    49.5 °F

  • Highest 20 March, 2026

    83.6 °F

Climate (2021–Present)

Boise Air Terminal (40.4 miles)

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  • Average Low 2021–2026

    44.2 °F

  • Average 2021–2026

    54.9 °F

  • Average High 2021–2026

    66.2 °F
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