Is it necessary for me to get a climate controlled storage unit?

Not necessarily, but it would all depend on what kind of items you are looking to store. It is always the best choice to have a climate controlled storage unit, however, it may be a bit more expensive or simply not available. The general rule of thumb is if your items are susceptible to moisture absorption, for example, clothing, wood, books, etc., in that case, you probably need a climate controlled unit. Here is a more detailed list of items that you may want to consider having a climate controlled unit.