Big Trinity Lake Weather Forecast

    • 14
    • 28

    Increasing Clouds

    • 22
    • 33

    Chance Snow Showers

    • 25
    • 42

    Mostly Sunny

    • 13
    • 34

    Chance Snow

    • 14
    • 25

    Chance Snow

    • 25
    • 35

    Chance Snow

    • 23
    • 41

    Chance Snow

Today 6 Mar Boise Mountains

Areas of fog this morning. Mostly sunny. Highs 34 to 48.

Tonight 6 Mar Boise Mountains

Increasing Clouds. Patchy fog this evening. Areas of fog after midnight. Lows 15 to 30.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Trinity Lake Temperature Statistics

March Temperature

Boise Air Terminal (40.4 miles)

  • Lowest 3 March, 2026

    36 °F

  • Average March

    46.5 °F

  • Highest 3 March, 2026

    60.1 °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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