Big Trinity Lake Weather Forecast
- -5
- 13
Increasing Clouds
- -6
- 16
Partly Sunny
- -3
- 11
Mostly Sunny
- 2
- 20
Partly Sunny
- 3
- 22
Mostly Sunny
- 7
- 22
Partly Sunny
Today 18 Jan Boise Mountains
Sunny. Highs 17 to 30.
Tonight 18 Jan Boise Mountains
Partly cloudy. Lows 4 below to 11 above zero.
Big Trinity Lake Temperature Statistics
January Temperature
Boise Air Terminal (40.4 miles)
Lowest 13 January, 2025
23 °FAverage January
34.4 °FHighest 3 January, 2025
49.6 °F
Climate (2020–Present)
Boise Air Terminal (40.4 miles)
Average Low 2020–2025
43.7 °FAverage 2020–2025
54.3 °FAverage High 2020–2025
65.6 °F