What is the Winkler Scale used for?

The Winkler Scale is a method used to assess the heat summation in viticulture, which is crucial for understanding the climatic conditions of a vineyard. This scale helps viticulturists measure the amount of heat accumulated during the growing season by calculating the daily average temperatures above a certain baseline, typically 50°F (10°C). The total degree days calculated using the Winkler Scale indicates the potential for grape ripening, influencing the selection of grape varieties suited to a specific climate and helping winemakers anticipate the characteristics of the resulting wine.

By understanding heat summation, vineyard managers can make informed decisions about planting times, grape variety selection, and harvest timing, ultimately impacting the quality and style of the wine produced in that region.