Lyons, in Illinois, United States, is home to roughly 10,700 people in the Central Time Zone at 41.8°N latitude.
In 2025, Lyons recorded an average annual temperature of 51°F — about 0.9°F below the 30-year normal of 52°F. The hottest day reached 96°F in August; the coldest was -8°F in February. Total precipitation was 38 inches (wetter than usual). The wettest month was June.
View current conditions and forecast for Lyons · More cities in Illinois