What is the primary difference in temperature range for ale and lager fermentation?

The primary difference in temperature range for ale and lager fermentation lies in the yeast types used and their temperature preferences. Ales typically ferment at warmer temperatures, usually ranging from about 60 to 75°F (15 to 24°C). This warmer fermentation environment allows for the development of more fruity and estery flavors, characteristic of many ale styles.

Lagers, on the other hand, are fermented with bottom-fermenting yeast strains at cooler temperatures, typically between 45 and 55°F (7 to 13°C). This cooler fermentation process results in a cleaner, crisper taste profile with fewer fruity esters and phenols.

Understanding this temperature difference is essential for brewing, as it influences the flavor characteristics and overall profile of the beer.