If you thought March in Illinois felt like summer, you’re right. State Climatologist Jim Angel says this month was the warmest March on record for the state. Angel says the average temperature was 59 degrees in southern Illinois. The last record of 51.6 degrees was set in 1946. According to the National Weather Service, 18 days reached above 70 degrees in Carbondale. Before this year, March temperatures that high have only happened 10 times since the early 1870s.