Pomerol is blessed with a mild maritime climate with drier summers and higher daytime temperatures than experienced in other Bordeaux communes. The risk of frost is very low due to the moderating influences of the Dordogne and Isle rivers.
The soil is a gravelly topsoil with layers of clay and sand with the clay more prevalent in the west and sand more apparent close to Libourne. The subsoil has a high proportion of a ferruginous sandstone called "crasse de fer" by locals.
The vineyards are planted to Merlot (80%), Cabernet Franc, Cabernet Sauvignon, and a dollop of Malbec. The Pomerol vines were destroyed during the Hundred Years' war but were replanted during the 15th and 16th centuries with the wines gaining acclaim for high quality during the latter half of the 19th century. The current vines are very old and low-yielding. This, coupled with the small surface area available for planting, results in sky-high prices for the wines.