Weather Watch Growing Degree Days (GDD)

GDD is a measure of the daily maximum and minimum temperature and directly relates to growth and development of plants and insects. The GDD of any zip code location in Ohio is estimated using the GDD of ten OARDC weather stations and available on the web at:http://www.oardc.ohio-state.edu/gdd/ . The range of GDD accumulations in Ohio from north to south is 27 to 105.