Seasonal Pest Calendar: What to Expect Each Month

December 31, 2025 · Regional Pest Guide Team · prevention seasonal

Pest activity follows predictable seasonal patterns. Knowing what to expect each month helps you stay ahead of problems instead of reacting to them. Here’s your month-by-month guide to pest awareness.

Key Strategies

  • January-February: Rodents are at peak indoor activity. Check traps, inspect for new entry points. Overwintering pests (stink bugs, boxelder bugs, ladybugs) may become active on warm days
  • March: Ant colonies become active as soil warms. Termite swarm season begins in southern states. Start perimeter treatments
  • April: Peak termite swarming month across much of the US. Carpenter bees begin drilling. Mosquito breeding starts in standing water
  • May: Tick season begins in earnest. Flea activity increases with warmer weather. Carpenter ants are very active. Wasp queens are building nests

Additional Considerations

  • June: Mosquito season peaks. Fire ant mounds multiply. Flies become a nuisance. Japanese beetles emerge in eastern states
  • July-August: Peak season for almost everything — mosquitoes, wasps, ants, spiders, ticks, fleas, flies. Yellow jacket populations peak in late summer
  • September: Rodents begin seeking indoor shelter. Wasp and yellow jacket nests are at maximum size and aggression. Fall webworms appear
  • October: Stink bugs, boxelder bugs, and Asian lady beetles seek indoor overwintering sites. Seal entry points now. Rodent prevention is critical
  • November-December: Indoor rodent activity increases. Pantry moths may increase with holiday baking supplies. Firewood pests (bark beetles, carpenter ants) can hitchhike inside

Taking Action

The key themes here are seasonal planning prevention year-round. Start with prevention, monitor for early signs of problems, and escalate to targeted treatments only when needed. Most pest issues are far easier to prevent than to resolve after they’re established.

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