Pest activity in Collin County follows predictable seasonal patterns driven by temperature, moisture, and pest biology. Knowing what to expect each season helps you stay ahead of infestations and time your treatments for maximum effectiveness.
Spring (March - May)
Spring is the most critical season for pest control in Collin County. As temperatures rise above 65°F, pest activity explodes.
Key pests:
- Termite swarms — Reproductive termites take flight in spring, usually after warm rain. This is the best time to spot an infestation early.
- Fire ants — Colony expansion begins, with new mounds appearing rapidly. March is the ideal time for broadcast treatment.
- Ants — Carpenter ants, crazy ants, and sugar ants begin foraging and entering homes.
- Spiders — Brown recluse and other spiders become active.
Spring action items:
- Schedule a termite inspection
- Apply broadcast fire ant treatment
- Begin quarterly general pest control
- Clear winter debris from foundation areas
Summer (June - August)
Peak pest season. Hot temperatures and humidity drive maximum pest activity.
Key pests:
- Mosquitoes — Peak season, especially June-September. Standing water from irrigation and summer storms fuels breeding.
- Fire ants — Largest mounds, most aggressive behavior.
- Wasps and yellow jackets — Colonies reach peak size by late summer. Become increasingly aggressive near food sources.
- Cockroaches — German and American roaches are most active.
- Fleas and ticks — Peak activity, especially for homes with pets.
Summer action items:
- Mosquito barrier spray every 3 weeks
- Maintain quarterly pest control
- Address wasp nests early before colonies peak
- Keep yards mowed and vegetation trimmed
Fall (September - November)
The transition season when pests begin seeking shelter indoors.
Key pests:
- Rodents — Rats and mice begin moving indoors as temperatures cool. This is the #1 season for new rodent infestations.
- Spiders — Peak indoor spider activity as they follow their insect prey inside.
- Cockroaches — Increased indoor activity.
- Stink bugs — Congregate on south-facing walls seeking warmth.
Fall action items:
- Rodent exclusion — seal entry points before they get in
- Quarterly pest treatment to maintain barrier
- Inspect attic and garage for signs of rodent activity
- Clean gutters to eliminate mosquito breeding sites
Winter (December - February)
The quietest season for pests, but indoor activity continues.
Key pests:
- Rodents — Peak indoor activity. This is when you're most likely to hear scratching in walls and attic.
- Cockroaches — Indoor populations remain active.
- Spiders — Active indoors.
Winter action items:
- Continue quarterly pest control
- Monitor for rodent activity
- Plan for spring termite inspection
- Schedule pre-season fire ant treatment for late February
Year-Round Protection
The most effective pest control strategy for Collin County homeowners is a quarterly service plan that adjusts treatments seasonally. Call Princeton Exterminator at (855) 544-1972 for a pest control plan tailored to your home and our local pest calendar.