Year of Production : In general, the year-to-year climate of the region remains fairly constant although there may be rare occasions of spring frost which may damage the buds, thus reducing the overall yield. Drought may also affect the quantity of production. Sunlight levels are usually the average to be expected. The year of production on a label is therefore not necessarily a sign of any particular quality due to exceptionally favourable wine growing weather; it is more indicative of how the wine can be expected to have matured over a number of years.