Pest Control in La Grande, OR

La Grande has a cold, mostly dry climate. July highs average about 86 degrees, August is the warmest month, and about 31 days a year reach 90 or above. January lows average around 25, and December is the coldest month. Precipitation totals only about 17 inches a year, with May the wettest month at roughly 2.2 inches, and about 9 inches of snow falls in a typical year. About 136 nights a year drop to freezing or below. These are 1991-2020 NOAA climate normals from a nearby weather station, so treat them as a guide, not a forecast.

More than 130 freezing nights and regular snow give rodents and overwintering insects a long reason to move into buildings. Snow banked against foundations can hide gaps and melt into crawl spaces, and stacked firewood beside the house is an easy nesting spot. Because May is the wettest month, spring brings a burst of damp soil and mosquito breeding just as ants and wasps become active.

A sensible La Grande calendar works around the freeze. In early fall, seal gaps, fit door sweeps and keep firewood away from walls. Through winter, check attics, garages and sheds for droppings, and clear snow away from vents. In spring, treat the exterior and watch for standing water after May rains. Summer's 30-odd hot days are a good time to fix leaks and look for wasp nests before they grow.