With a population of around 1,700, Jerome sits in Illinois, United States. The city operates in the Central Time Zone.
In 2025, Jerome recorded an average annual temperature of 55°F — about 1.0°F above the 30-year normal of 54°F. The hottest day reached 95°F in June; the coldest was -5°F in January. Total precipitation was 34 inches (drier than usual). Snowfall totaled 9 inches, below the 22-inch average. The wettest month was July.
View current conditions and forecast for Jerome · More cities in Illinois