Since worms are cold blooded creatures they need to have range of exterior temperatures that will prevent them from over heating or freezing. The temperature range shall be between 40 and 80 degrees. The bins shall not be placed in direct sunlight or have exposure to rain due to the fact that the worms breathe through their skin. Worms are also sensitive to light; therefore the bins shall be covered. The best place to store the worm bin is within a garage or basement where the temperature stays within the safe temperature range.