Red and white wines are also fermented under slightly different conditions. White wine takes two to 45 days to ferment, and is kept at a temperature between 45 and 65 degrees Fahrenheit. The temperature controls the taste of the wine, with lower temperatures resulting in fruitier flavors. Red wine is fermented at a much higher temperature, between 70 and 80 degrees Fahrenheit, but only takes two to five days to ferment.