Helena has an average daily temperature above 85 degrees in July and August. In July, the historic average high in Helena is 83.4. High temperatures and humidity can cause mold and mildew to thrive. If you're considering storing items that are susceptible to mold and mildew during this period, consider renting a climate controlled storage unit.
Colleges and universities located in or nearby Helena include Drury University and Mount Olive College. College students often need storage during summer and winter breaks and can drive prices up during these seasons.