Big Trinity Lake Weather Forecast

    • 31
    • 53

    Rain Showers

    • 29
    • 41

    Rain/Snow

    • 24
    • 38

    Rain/Snow

    • 23
    • 33

    Snow Showers

    • 23
    • 35

    Chance Snow Showers

    • 19
    • 34

    Snow Showers Likely

Today 10 Apr Boise Mountains

Numerous rain Showers in the Morning, then widespread rain Showers and isolated Thunderstorms in the afternoon. Chance of rain 80 percent. Highs 59 to 72.

Tonight 10 Apr Boise Mountains

Rain Showers. Thunderstorms Likely, mainly in the evening. Areas of fog after midnight. Chance of rain 80 percent. Lows 30 to 45.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Big Trinity Lake Temperature Statistics

April Temperature

Boise Air Terminal (40.4 miles)

  • Lowest 3 April, 2026

    30.7 °F

  • Average April

    52 °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

    54.9 °F

  • Average High 2021–2026

    66.2 °F
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