Fairfield is a city of approximately 5,300 people in Illinois, United States. Located in the Central Time Zone at 42.2°N latitude.
Fairfield has a humid continental climate. Average annual temperature is 51°F, with January lows around 18°F and July highs near 84°F. The city averages 32 inches of precipitation per year. The wettest month is typically June; the driest is February.
View historical weather for Fairfield · More cities in Illinois