Iona is a city of approximately 2,100 people in Idaho, United States. Located in the America/Boise time zone at 43.5°N latitude.
In 2025, Iona recorded an average annual temperature of 48°F — about 3.7°F above the 30-year normal of 44°F. The hottest day reached 96°F in August; the coldest was -19°F in January. Total precipitation was 13 inches (wetter than usual). The wettest month was October.
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