Big Trinity Lake Weather Forecast

    • 46
    • 70

    Mostly Sunny

    • 44
    • 69

    Mostly Sunny

    • 43
    • 63

    Partly Sunny

    • 34
    • 57

    Rain Showers

    • 27
    • 45

    Rain Showers Likely

    • 26
    • 42

    Chance Snow Showers

Today 23 Jun Boise Mountains

Sunny. Highs 76 to 91.

Tonight 23 Jun Boise Mountains

Increasing Clouds. Lows 45 to 60.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Trinity Lake Temperature Statistics

June Temperature

Boise Air Terminal (40.4 miles)

  • Lowest 11 June, 2026

    44.7 °F

  • Average June

    68.7 °F

  • Highest 16 June, 2026

    95.6 °F

Climate (2021–2026)

Boise Air Terminal (40.4 miles)

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  • Average Low 2021–2026

    44.2 °F

  • Average 2021–2026

    55 °F

  • Average High 2021–2026

    66.3 °F
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