Degree Day Calculator
 
Growing degree days are a critical vine performance index. The PremiereVision application collects daily real-time weather data from 17 CIMIS stations throughout the state. Complete weather data is stored back to 1999. The free Degree Day Calculator allows you to easily compare the degree day accumulation for any time period or CIMIS station. For example, you can chart Oakville against Lodi and Hopland for the month of August, in 1999, and again in 2001. Tracking and comparing degree days for the current year against previous years or locations helps a viticulturist or winemaker plan for harvest date, yields, and other critical parameters. Our free tool uses the industry standard Winkler model to calculate growing degree days.
 
Click on the Free Tools button to get a password and check out the Degree Day Calculator.