Big Trinity Lake Weather Forecast
- 15
- 33
Snow
- 7
- 22
Snow Likely
- 11
- 26
Chance Snow
- 21
- 35
Partly Sunny
- 26
- 42
Partly Sunny
- 15
- 38
Chance Snow
Today 4 Mar Boise Mountains
Increasing Clouds. Patchy fog this morning. Rain. Snow this Morning, then snow Showers with a slight chance of Thunderstorms this afternoon. Thunderstorms may produce heavy Rainfall, gusty Winds, and small hail this afternoon. Chance of precipitation near 100 percent. Little or no snow accumulation across the lower Elevations, with snow accumulation up to 2 Inches over the Mountains. Highs 40 to 53. Temperature falling into the lower 40s this afternoon. Breezy.
Tonight 4 Mar Boise Mountains
A slight chance of Thunderstorms in the evening. Snow. Patchy fog in the evening. Areas of fog after midnight. Thunderstorms may produce heavy Rainfall, gusty Winds, and small hail in the evening. Chance of snow near 100 percent. Snow accumulation up to 1 inch across the lower Elevations, with up to 5 Inches over the Mountains. Lows 19 to 33. Brisk.
Big Trinity Lake Temperature Statistics
March Temperature
Boise Air Terminal (40.4 miles)
Lowest 1 March, 2026
41 °FAverage March
46.7 °FHighest 1 March, 2026
54 °F
Climate (2021–Present)
Boise Air Terminal (40.4 miles)
Average Low 2021–2026
44.1 °FAverage 2021–2026
54.9 °FAverage High 2021–2026
66.1 °F