This study examines U.S. crop producers' perceptions of climate change, itseffects on crop agriculture, and likely ways farmers would adapt to weatherextremes. Based on a survey of crop producers in four states, we find that asignificant proportion of farmers do not perceive that climate change hasbeen scientifically proven and do not believe that it will adversely affectaverage crop yields and yield variability. Farmers are likely to diversifycrops, buy crop insurance, modify lease arrangements, and exit farming inresponse to extreme weather caused by climate change.