Triangle Lake Weather Forecast
- 38
- 45
Mostly Sunny
- 46
- 57
Sunny
- 48
- 60
Sunny
- 50
- 62
Partly Sunny
- 51
- 62
Partly Sunny
- 48
- 62
Slight Chance Rain Showers
Today 15 Sep Lower Hells Canyon/Salmon River Region
Mostly cloudy until late afternoon then clearing. A 20 percent chance of rain Showers early in the morning. Patchy smoke late in the afternoon. Highs in the 60s to lower 70s.
Tonight 15 Sep Lower Hells Canyon/Salmon River Region
Mostly clear. Patchy smoke in the evening. Lows in the mid 40s to lower 50s.
Triangle Lake Temperature Statistics
September Temperature
McCall Airport (36.7 miles)
Lowest 13 September, 2025
37.9 °FAverage September
61.5 °FHighest 2 September, 2025
90 °F
Climate (2020–Present)
McCall Airport (36.7 miles)
Average Low 2020–2025
30.5 °FAverage 2020–2025
42.6 °FAverage High 2020–2025
54.5 °F