You weren't imagining it: March was definitely colder than usual.
When compared to March 2012, the average temperature this year was 21.2 degrees colder, according to Jim Angel, state climatologist at the Illinois State Water Survey, part of the University of Illinois at Urbana-Champaign.
The statewide average temperature for March 2013 was 34.1 degrees, which is 7 degrees below the long-term average of 41.1 degrees and the 11th coldest March on record. In contrast, March 2012 was 55.3 degrees, which was the warmest March on record.
The statewide precipitation was 2.85 inches, which is 0.15 inches below the long-term average of 3 inches. Precipitation amounts were the highest just east of St. Louis and lowest in east-central Illinois. The largest monthly total came from Kaskaskia with 6.42 inches of precipitation. Several surrounding sites had an excess of 5 inches of precipitation.
Snowfall was above average for the month due to a large storm that passed through central Illinois on April 24-25 and some earlier events that passed through northern and western Illinois. Springfield received 17 inches of snow in 24 hours, a new record for that site.