Our Portland pest service gets more calls to eliminate spiders during the late summer and early fall than any other time of year.

Spider in doorway

Spider in doorway

Let’s look at why this is the case.   First off, they attract your attention more because they are huge!   After a spring and summer of feasting on all sorts of prey, the spiders that remain in late summer and fall are often very large.   They stand out like a sore thumb.  

In spring and summer’s bright light, smaller spiders (and smaller webs) don’t always show up as much as they do in fall. Next, their webs move in closer to the house.   Earlier in the year, webs are more likely to be in trees and bushes.   Later in the year, these webs start getting closer to structures and their entrances.   It is much more common to open a door in the morning and find a large web across the upper corner that wasn’t there last evening.   What is the cause for this migration? Temperature.   As fall temperatures start to decline, spider start to look for warmer shelter.   This is common to many pests, particularly mice.   Heated houses make a perfect place for spiders to weather the cold winter.

Spider bites tend to be more common over fall and winter once this migration has completed and the spiders are settled in there new homes (yours!) A pre-emptive exterior treatment is a smart way to avoid sharing your home with these spiders over the winter.   Since spiders, unlike other crawling pests, are subject to “blow in” through windows and doors, periodic treatment might be needed in some situations until the temperatures sufficiently drop enough to kill off those that remain outside. If you are ready to keep spiders from spending the winter in your home, contact All Pest right now!