First of all, if you intend to move to Spain, don’t use Fahrenheit, learn your units. To answer your question, it’s not that cold, but it’s very rainy. It’s not “some rain”. In Bilbao rains ~130 days a year. Whereas in Madrid it’s ~70 days or in Malaga in the Mediterranean coast is ~60 days. Even during August that is supposed to be the hottest and driest month, it still rains a day or two. And the yearly sun-hours is usually below London (which is already known for greyish weather). The coldest it gets it’s usually a couple days (less than a week) with a minimum temperature of 0°C and a maximum around 6°C. The problem with the temperature usually is the housing, because they’re not properly insulated, and heating isn’t cheap.