All Climate Zones
Compare termite risk across different climate zones.
Seasonal activity, cold winters limit exposure, short active season.
TL;DR: Cool temperate zones (Northern US, Canada, Great Lakes) face lower termite risk. Cold winters (below 32°F) severely limit activity. Active season only 3–5 months (May–September). One annual inspection usually sufficient. — How inspections work or call (833) 404-3632.
Cool temperate regions experience harsh winters that severely limit termite activity. Cold temperatures force termites into dormancy for extended periods:
Build mud tubes from soil to wood. Create large colonies but smaller than warm-zone colonies. Most common species in cool temperate regions. Dormant in winter, active spring through fall.
Live inside wood without soil contact. Extremely rare in cool temperate zones due to cold winters. If present, usually in heated structures. Produce pellet-like frass.
Prefer high-moisture wood. Very uncommon in cool temperate zones. Found only in areas with significant water intrusion or heated buildings.
High-risk areas: Crawl spaces (protected from cold), basements, attics (if heated), bathrooms and kitchens (moisture), exterior wood (foundations, decks, siding), areas near downspouts or poor drainage.
Active season: May–September, especially June–August. Winter (December–February) sees virtually no activity. Spring swarmers common after first warm spell (April–May).
Repeated signs: If mud tubes, frass, or discarded wings reappear after cleanup, active infestation likely. One-time sightings may be swarmers, but recurrence indicates established colony.
Multiple locations: Signs in different areas (foundation AND attic, or multiple walls) suggest larger infestation. Immediate professional inspection warranted.
Cool temperate zones have dramatic seasonal variation. Activity is highly predictable:
Virtually no activity. Termites dormant deep in soil or protected areas. Freezing temperatures stop all feeding. No inspections needed.
Activity begins as temperatures warm. Swarmers emerge after first warm spell (April–May). Mud tubes become visible. Schedule inspections now.
Highest activity. Warm conditions ideal for feeding and reproduction. Multiple swarms possible. Watch closely for new signs.
Activity declines as temperatures drop. Colonies prepare for winter dormancy. Activity stops by November. Follow-up inspections if summer activity detected.
Frass: Pellet-like, uniform size, piles near small holes, tan or brown. Sawdust: Irregular shavings, usually from carpentry, no organized piles.
Mud tubes: Raised, earthy, crumble when broken, often rebuilt. Cracks: Part of the material, don't crumble, not rebuilt.
Termite swarmers: Appear in spring after warm spell, soft bodies, equal wings. Carpenter ants: Larger, darker, unequal wings, appear year-round.
Termite damage: Hollow galleries, mud lining, wood still structurally intact but weakened. Rot: Soft, crumbly, discolored wood, no mud lining.
Cool temperate conditions allow for simplified prevention strategies:
Schedule before summer season (April–May). One inspection usually sufficient. After heavy rains or flooding, inspect within 2 weeks.
Fix leaks promptly. Ensure proper drainage. Ventilate crawl spaces and attics. Redirect downspouts away from foundation.
Keep mulch 12+ inches from foundation. Trim vegetation touching roof/siding. Store firewood away from house. Use treated wood for new construction.
Preventive treatments less critical than warm climates. Consider only if previous activity detected or high-risk property.
In cool temperate zones, professional help is important during active season. Call immediately if you notice:
Compare termite risk across different climate zones.
Detailed guide to recognizing termite activity.
Climate-appropriate prevention tips.
What to expect during a professional inspection.