Chardonnay was born in the cool region of Burgundy, but it can be grown in cool places as well as relatively mild and warm climates. The greatest feature of the Chardonnay variety is that it can be produced into a wide variety of wines depending on the region, climate, soil composition, and skill of the winemaker.
In other words, the aroma and flavor can vary greatly depending on where, how, and by whom the wine was grown and aged. This is true for any wine, but especially for Chardonnay, if you find one that you like or don't like very much, it's a good idea to check the place of origin and, if possible, the producer and address, and keep a record of them to help you decide.
In the Champagne region, champagne is generally blended with black grapes such as Pinot Noir and Pinot Meunier (grapes generally used for red wine), but Blanc de Blanc (a white wine made from white grapes) made using only Chardonnay is particularly clean and sharp, with a rich mineral finish.