This study examines U.S. crop producers' perceptions of climate change, its effects on crop agriculture, and likely ways farmers would adapt to weather extremes. Based on a survey of crop producers in four states, we find that a significant proportion of farmers do not perceive that climate change has been scientifically proven and do not believe that it will adversely affect average crop yields and yield variability. Farmers are likely to diversify crops, buy crop insurance, modify lease arrangements, and exit farming in response to extreme weather caused by climate change.