May often brings more spiders because spring’s warmer weather, increased insects, and quiet hiding spots attract them. If you wonder why you see so many spiders in May, your home may offer food, shelter, and easy access all at once.

The spike in spider sightings usually means spider activity is picking up, and small problems inside or around your home make them easier to spot.
House spiders often stay hidden until conditions change. Once insects become more active and indoor spaces feel warm and protected, you may notice more webs and movement in corners.
Why Spiders Show Up In May

May sits in the middle of a seasonal shift, so spiders become more active and easier to notice. A rise in insects, mild temperatures, and sheltered indoor spaces all make homes more appealing to house spiders.
Seasonal Activity Picks Up In Late Spring
As spring moves into late spring, spider movement increases and more species become active. You may see them roam more often or spin fresh webs.
Indoor Insects Draw Spiders Inside
Spiders follow their food. If your home has flies, ants, mosquitoes, or other pests, spiders find reasons to stay nearby and hunt.
Warmth, Moisture, And Shelter Make Homes Appealing
Homes provide warmth, moisture, and protection from weather. Bathrooms, basements, laundry rooms, and garages can feel inviting, especially when outdoor conditions are wet, dry, or unstable.
Where They Get In And Where They Hide

Spiders usually enter through small openings. Once inside, they settle into dark, quiet spots where they can stay undisturbed and build webs.
Cracks, Gaps, And Other Common Entry Points
Tiny openings around foundations, siding, pipes, and utility lines let spiders in. Even small gaps make it hard to keep spiders out once they find a path.
Window And Door Screens, Doors, And Vents
Damaged or loose window and door screens, gaps under doors, and open vents let spiders indoors. Check these spots if you want to keep spiders out.
Cluttered, Dark, And Undisturbed Areas
Spiders like places where they will not be disturbed. Basements, storage rooms, closets, under furniture, and piles of boxes can become ideal hiding spots.
How To Prevent A Bigger Problem

You can prevent spiders from settling in by making your home less attractive to them. Cut down their food supply, block entry points, and remove places where they can hide.
Reduce The Insects Spiders Feed On
Fewer insects mean less reason for spiders to stay. Turn off unnecessary lights near doors at night, clean up crumbs, and address bug problems early so spiders lose their food source.
Seal Openings And Lower Indoor Humidity
Seal cracks, fix torn screens, and close gaps around doors and vents. Lowering indoor humidity helps, since damp spaces can draw both insects and spiders.
Clean, Declutter, And Check Items Brought Indoors
Vacuum corners, move stored items, and clear clutter from basements, garages, and closets. Before bringing in boxes, bags, firewood, or outdoor gear, check them for hidden spiders or webs.
When To Be Concerned

A few spiders in spring is normal. A growing number of sightings can point to a larger issue.
Pay close attention if you see webs in many rooms, frequent spider activity, or signs that spiders are reproducing indoors.
Signs The Issue May Need Expert Help
You may need more than basic cleanup if spiders keep returning after you seal openings and reduce clutter. A steady rise in webs, egg sacs, or sightings in living spaces can suggest a spider infestation.
When Black Widow Or Brown Recluse Are A Risk
If you live in an area where black widow or brown recluse spiders are common, take sightings more seriously. These spiders can pose health risks, so avoid handling them and watch for hiding places in garages, sheds, and storage areas.
When To Call Pest Control Professionals
If spider activity keeps growing, or you cannot find the source, pest control professionals can inspect your home and help target the problem.
They can also look for hidden entry points and reduce the insects that may be drawing spiders inside.