Pest control in Hermiston, OR

Pest season in Hermiston

NOAA's 1991–2020 climate normals for the HERMISTON MUNI AP, OR station show an average temperature of 53.9°F, about 8.6 inches of precipitation a year spread over roughly 28 days with measurable rain or snow, 115 nights at or below freezing and 50 days reaching 90°F or more. Monthly averages are at or above 50°F for 7 months, so insect activity is concentrated in a clear warm season, while 115 freezing nights a year push mice and some insects to look for shelter indoors. Average temperatures are at or above 50°F from about April through October.

Moisture and pests

Hermiston is arid, with only about 8.6 inches of precipitation a year. In dry climates, pests concentrate around sources of water and shade, such as irrigated yards, drains, utility areas and the cooler indoor spaces of a home, especially during the hottest stretches (about 50 days a year reach 90°F).

Homes and pest entry points

The median year built for housing in Hermiston is 1986, and about 43% of its 7,014 housing units were built before 1980. Homes from this era often have settled foundations, aging weatherstripping and wood trim that can let pests in, and many have crawl spaces or basements worth checking for moisture. About 27% of housing units are in buildings with two or more units, where cockroaches and bed bugs can move between neighboring homes through shared walls and plumbing.

Services most relevant in Hermiston

• Rodent Controlabout 115 freezing nights a year push mice indoors
• Bed Bug Treatment27% of homes in multi-unit buildings
• Cockroach Controlshared walls and plumbing in multi-unit buildings
• Ant Controlabout 7 months a year average 50°F or more
• General Pest Controlone call when you are not sure what the pest is

Owners, landlords and tenants

About 62% of occupied homes in Hermiston are owner-occupied and 38% are rented. Homeowners, landlords and property managers can call to be connected; tenants should usually report pest problems to their landlord or property manager first, since leases and local rules often make treatment their responsibility.

Nearby places

Hermiston is in Umatilla County. Places within about 30 miles include Kennewick, WA (26 mi), Pendleton (25 mi), Umatilla (6 mi) and Boardman (20 mi).

Sources: Census Bureau Vintage 2025 estimate (July 1, 2025) for population; American Community Survey 2020–2024 5-year (tables B25003, B25024, B25034, B25035); 2024 Gazetteer; NOAA NCEI U.S. Climate Normals 1991–2020 (annual and monthly).