Our Insights | Agronomy
June 04, 2018

Central Illinois Weather Update

So far, 2018 weather in Illinois has been one for the record books. Thus, having a major effect on crop growth throughout the state. Let’s have a look at departures from average temperatures in Springfield, IL.

April, with its below average temperatures, claimed the title of 2nd coldest in Illinois history. Crops planted before April 20th were slow to germinate/emerge and in some cases not at all. At this time, crops planted after April 20th seem to have the advantage, even more so when using seed treatment technologies.


Source: https://www.accuweather.com/en/us/springfield-il/62712/month/27502_pc?monyr=4/01/2018


May came in a complete 180 from April and recorded the top spot as the hottest May on record in Illinois. In fact, not one single day notched a recording at or below the historical average. Therefore, the crops are accumulating GDU’s at a rapid pace with no signs of slowing down when looking at the June long-term forecast. Current GDU accumulation from April 20 to June 4 in Springfield, IL is 924. Compare that to the past 11 year average of 578.


Source: https://www.accuweather.com/en/us/springfield-il/62712/month/27502_pc?monyr=5/01/2018


If the pattern continues, crops will enter the reproductive growth stages later this month where rainfall will be a large determining factor in yield, especially in areas that have missed some of the rains in late May. This also mean we’ll be going straight from herbicide applications to fungicide applications.