Three Island State Park Weather Forecast
- 46
- 81
Mostly Sunny
- 55
- 87
Mostly Sunny
- 53
- 82
Partly Sunny
- 52
- 82
Mostly Sunny
- 57
- 89
Mostly Sunny
- 59
- 93
Mostly Sunny
Today 24 May Upper Treasure Valley
Sunny. Highs 77 to 82. Northwest Winds 10 to 15 Mph.
Tonight 24 May Upper Treasure Valley
Mostly clear. Lows 44 to 53. Northwest Winds 10 to 15 Mph in the Evening, shifting to southeast after midnight.
Three Island State Park Temperature Statistics
May Temperature
Mountain Home Air Force Base (28.6 miles)
Lowest 19 May, 2025
33.7 °FAverage May
58.8 °FHighest 10 May, 2025
92.6 °F
Climate (2020–Present)
Mountain Home Air Force Base (28.6 miles)
Average Low 2020–2025
39.6 °FAverage 2020–2025
52.1 °FAverage High 2020–2025
64.8 °F