Forrest is a city of approximately 1,200 people in Illinois, United States. Located in the Central Time Zone at 40.8°N latitude.
In 2025, Forrest recorded an average annual temperature of 53°F — right at the 30-year normal of 52°F. The hottest day reached 91°F in July; the coldest was -8°F in January. Total precipitation was 31 inches (drier than usual). The wettest month was July.
View current conditions and forecast for Forrest · More cities in Illinois