Spiders are a very common complaint, most often during the late Fall or the Winter months, but also in the spring.
The best spider control is achieved on the outside of buildings. This can usually be dealt with from May to November. Ground spiders require the same control methods, often including some control also on inside. Daddy Long Leg spiders can take over basements and are fairly easy to control anytime of year.
To protect your home from many spider varieties keep leaves and debris away from structures in Fall and Winter months.