Big Trinity Lake Weather Forecast

    • 14
    • 29

    Mostly Sunny

    • 21
    • 34

    Partly Sunny

    • 20
    • 35

    Chance Snow Showers

    • 22
    • 38

    Chance Snow Showers

    • 26
    • 42

    Slight Chance Snow Showers

    • 28
    • 47

    Slight Chance Snow Showers

Today 24 Apr Boise Mountains

Mostly sunny. Areas of fog this morning. A slight chance of snow Showers this afternoon. Chance of snow 20 percent. Highs 38 to 53. Breezy.

Tonight 24 Apr Boise Mountains

Mostly clear. Lows 15 to 30.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Trinity Lake Temperature Statistics

April Temperature

Boise Air Terminal (40.4 miles)

  • Lowest 17 April, 2026

    29.6 °F

  • Average April

    51.4 °F

  • Highest 6 April, 2026

    74.6 °F

Climate (2021–Present)

Boise Air Terminal (40.4 miles)

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  • Average Low 2021–2026

    44.2 °F

  • Average 2021–2026

    55 °F

  • Average High 2021–2026

    66.2 °F
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