How Climate Can Vary from Region to Region, Even Farm to Farm
There are three types of climate that affect the quality of grapes.
The Macro-Climate is the climate of a large area within a district. It might cover many farms that all have the same weather patterns.
The Meso-Climate is the climate experienced by a specific vineyard block (on one farm, say) and it is influenced by slope, altitude, surrounding water masses such as lakes and dams, and the protection afforded by hills, ridges or avenues of trees. All these factors mean that a block of Cabernet grown on one part of a farm produces a different quality wine to a block of Cabernet grown on another part of the same farm and is the reason why a producer may give a different name to the same varietal of wine produced by it. Then we go down to…
The Micro-Climate, the prevailing climate within the vine canopy, which is influenced by row direction, the trellising system used and the nature of the soil surface. This is why even wines from different barrels taste differently.