Ah, I have read about Temperatures now in your Design section. Ty

Regulating the temperature in a worm bin is essential to maximize the worms efficiency. The ideal range is 60-80 degrees Fahrenheit. If you are cold, so are they. If you are hot, so are your worms. While your composting worms will tolerate temperatures outside this ideal range, do your best to keep the temp within 60-80 degrees F because this is when your worms are most productive.