Scorpion Season: What Homeowners Need to Know

If you live in the American Southwest — Arizona, New Mexico, Texas, Nevada, or Southern California — scorpions are not a hypothetical threat. They’re a seasonal reality. And while most scorpion stings are painful but not life-threatening, one species found in Arizona changes that calculation entirely.

Here’s what every homeowner in scorpion territory needs to know.

When Is Scorpion Season?

Scorpions are most active from April through October when temperatures rise above 70°F. They’re nocturnal hunters, so most encounters happen at night or in dark, undisturbed spaces — closets, shoes, under furniture, in piles of laundry left on the floor.

During winter they go dormant, often sheltering inside walls, under slabs, and in insulation.

The Species That Matters Most

The Arizona Bark Scorpion (Centruroides sculpturatus) is the only scorpion in the US considered medically significant. Its venom can cause severe pain, numbness, vomiting, and in rare cases — especially in children, the elderly, or those with compromised immune systems — serious neurological symptoms requiring emergency treatment.

It is also the most common scorpion in Arizona and parts of neighboring states. It is light tan to yellow-brown, slender, and about 2–3 inches long. Unlike most scorpions, it can climb walls and ceilings.

5 Ways to Reduce Scorpions in and Around Your Home

1. Seal entry points — Scorpions can enter through gaps as thin as a credit card. Seal gaps around doors, windows, pipes, and utility lines with weatherstripping and caulk.
2. Eliminate harborage — Remove woodpiles, rock piles, and debris from around the foundation. These are prime scorpion shelter.
3. Reduce moisture — Fix leaky pipes and standing water. Scorpions hunt insects and insects are attracted to moisture.
4. Use a UV blacklight — Scorpions fluoresce bright green-blue under UV light. A $10 blacklight flashlight lets you do a nighttime inspection of your home’s interior and perimeter.
5. Perimeter treatment — A licensed pest control professional can apply a residual insecticide barrier around the foundation that reduces scorpion activity significantly.

If You’re Stung

For most scorpion stings: wash the area, apply a cold pack, and take an over-the-counter pain reliever. Monitor for 30 minutes.

Seek emergency care immediately if the sting victim is a child under 6, an elderly person, or if you observe difficulty breathing, muscle spasms, slurred speech, or blurred vision — these are signs of bark scorpion envenomation.

Not Sure What Scorpion You Found?

Species identification matters — especially in Arizona. A photo ID can tell you within seconds whether you’re dealing with a bark scorpion or one of the dozens of less dangerous species.