Watch out of freezing temperaturesElwynn Taylor, Iowa State University Extension Service climatologist, warned farmers about planting too early. He says that while Iowa temperatures are breaking 1936 Dust Bowl records lately, farmers there should expect a freeze. He expects warm temperatures into this week then the weather could change. He notes that here has been only one year out of the past 100 when farmers could have planted on March 15 and everything would have been fine. One chance in a hundred is tough odds. That one year was 1946.