Three Island State Park Weather Forecast
- 31
- 47
Rain/Snow Likely
- 36
- 50
Rain/Snow Likely
- 41
- 62
Rain Likely
- 33
- 54
Rain Showers
- 28
- 50
Chance Rain Showers
- 35
- 54
Mostly Cloudy
Today 14 Mar Upper Treasure Valley
Partly sunny this Morning, then mostly cloudy with isolated rain and snow Showers this afternoon. Chance of precipitation 20 percent. Highs 44 to 49. Light Winds this Morning, becoming south 10 to 15 Mph this afternoon.
Tonight 14 Mar Upper Treasure Valley
Mostly cloudy with a chance of rain and snow. Chance of precipitation 30 percent. Lows 30 to 35. Southeast Winds 10 to 15 Mph.
Three Island State Park Temperature Statistics
March Temperature
Mountain Home Air Force Base (28.6 miles)
Lowest 8 March, 2025
23.9 °FAverage March
43.9 °FHighest 11 March, 2025
63.1 °F
Climate (2020–Present)
Mountain Home Air Force Base (28.6 miles)
Average Low 2020–2025
39.5 °FAverage 2020–2025
52.1 °FAverage High 2020–2025
64.7 °F