If it seems like 2019 has been a year of weather extremes, the facts prove it. Now there’s one big question looming — will an early frost hit Iowa?

 

“There’s no way to predict frost,” said Justin Glisan, the state climatologist of Iowa. “We do know the average frost in Iowa occurs around mid-October, with early frosts occurring in late September to early October, and late frosts occurring in late October to mid-November.”

Trends in recent years have also meant warmer autumn months in Iowa. “In the last few...