At least here, so far, weather seems comparable to 1995. That year (here), had window to plant corn early in April, then wet thru end of May or 1st week in June. Late-planted corn (1st-2nd week June) yielded around 65% of early-planted corn (2nd week April). Early planted corn exceeded APH averages here in 1995, except for flooded areas. No problems planting soybeans in June. From early June thru rest of summer, very minimal rainfall. 1995 Soybeans yielded 80-90% of APH averages here. Biggest differences here between 1995 and 2019 -- 2019 rainfall in May is greater than 1995; March 1995 was drier than 2019 for fieldwork, putting on NH3; April 2019 corn planting window was a week longer and a week later than 1995 (though much of this 2019 window was used for fieldwork and NH3, if not done in fall 2018, which was generally wetter than normal).
Locally, I know people who got all their corn planted, and even some soybeans, before the rains hit. I also know people who have been unable to get anything planted. And everything in between. My guess on local planted percentages right now -- perhaps 65-75% corn planted, rest to be late or PP, probably 20-25% of planted corn needs to be replanted or spotted in -- perhaps 5% of soybeans planted.
[by APH averages, I mean 10-year average yields at the time, not recent nor trend yields]
