Boxelder bugs are generally inactive in cold winter months, and begin to come alive as the temperature rises. Females lay eggs in Spring that will soon hatch, and mature into adults over the summer months. After summer months, the now fully grown bugs will look for cool, dry places to mate and restart the cycle. These bugs are much more active during Spring and Summer, when the weather is warmer, than they are in cooler months. If you’ve noticed an infestation in your home, now may be the best time to have your home treated!