Three Island State Park Weather Forecast
- 47
- 78
Mostly Sunny
- 47
- 80
Sunny
- 55
- 87
Mostly Sunny
- 57
- 94
Partly Sunny
- 52
- 88
Slight Chance Rain Showers
- 46
- 77
Chance Rain Showers
Today 7 May Upper Treasure Valley
Sunny. Highs 76 to 81. Southeast Winds 10 to 15 Mph.
Tonight 7 May Upper Treasure Valley
Mostly clear. Lows 46 to 52. East Winds around 10 Mph.
Three Island State Park Temperature Statistics
May Temperature
Mountain Home Air Force Base (28.6 miles)
Lowest 1 May, 2025
36.7 °FAverage May
55.7 °FHighest 2 May, 2025
81.6 °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