Calgary Pest Calendar: Month-by-Month Guide
Understand Calgary's unique pest patterns influenced by our climate, Chinooks, and seasons. Know what to expect and when to take action.
Ants
Emerge from dormancy seeking food. Carpenter ants become active.
Mice
Spring breeding season begins. Look for new entry attempts.
Wasps
Queens emerge to build new nests. Early removal is key.
Spiders
Become active hunting insects attracted to warming homes.
Pro Tip: Seal entry points before pests become active. Clean gutters and check foundations.
Wasps & Hornets
Peak activity. Nests reach maximum size by late summer.
Ants
Colonies at full strength. Outdoor activity peaks.
Bed Bugs
Travel season increases spread. Check luggage after trips.
Flies
Warm weather brings increased fly activity indoors.
Pro Tip: Keep food covered outdoors. Inspect luggage after travel. Screen windows and doors.
Mice & Rats
Seek indoor shelter as temperatures drop. Peak entry season.
Spiders
Move indoors seeking warmth and mates.
Cluster Flies
Gather on sunny walls, enter through small gaps.
Ladybugs
Congregate on homes seeking winter shelter.
Pro Tip: Critical time to seal entry points. Check weatherstripping and door sweeps.
Mice
Already inside, breeding continues. Listen for scratching sounds.
Cockroaches
Thrive in heated indoor spaces year-round.
Bed Bugs
No seasonal slowdown. Active in heated homes.
Overwintering Pests
Cluster flies, ladybugs emerge on warm days.
Pro Tip: Chinooks can trigger pest activity. Monitor for signs of indoor infestations.
Calgary's Unique Pest Challenges
Calgary's climate creates unique pest patterns. Our cold winters don't eliminate pests—they drive them indoors. Chinook winds can warm temperatures by 20°C in hours, confusing pests and triggering unusual activity in winter months.
The city's rapid growth also impacts pest activity. New construction disturbs rodent habitats, pushing mice and rats into established neighborhoods. Understanding these patterns helps Calgary homeowners stay ahead of infestations.