How Weather Affects Pest Behavior Help Keep The Pests Away Whether conditions in your area are hot and humid or cool and dry, your weather directly affects pests and their activities. Learn how the weather patterns can influence pest behaviors: Rainy, Wet Weather – Expect an increase in the number of pests you see entering buildings during rainy, wet weather. Moisture promotes pest reproduction and growth. And pests invade buildings for three specific needs – food, water and shelter. Therefore additional pests mean a greater need for food sources, reaching beyond their normal habitat to find food. Rainfall and Flooding – Insects retreat from flooded soil to seek dry ground. And where can dry ground be found? Inside structures, of course. Typically, pests will look for shelter in wall voids and under foundations, sometimes relocating entire colonies. Dry Conditions – While wet conditions promote pest reproduction, dry conditions find pests looking for water sources. The chance of pests may be smaller, but pests will be relentless in their search to find water for survival. Cool or Cold Weather – Warmth indoors may attract pests into the indoor environment. Often cold temperatures affect the survival of many types of pests, and they will seek the warmth and shelter of buildings.