by Trent Ford, State Climatologist
ISWS PRI University of Illinois
Spring weather extended yet another week with average temperatures from the low 50s in northern Illinois to low 60s in southern Illinois, between 3 and 8 degrees below normal. While most places stayed above freezing overnight this week, we did wake up to temperatures in the 30s and heavy frost, including lows of 33 degrees in Dixon and in Rockford. The cooler start to May is quite a contrast to what ended up being the warmest April on record statewide last month.…