With a population of around 15,000, Ammon sits in Idaho, United States. The city operates in the America/Boise time zone.
In 2025, Ammon recorded an average annual temperature of 49°F — about 4.9°F above the 30-year normal of 44°F. The hottest day reached 97°F in August; the coldest was -14°F in January. Total precipitation was 13 inches (wetter than usual). The wettest month was May.
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