Wasco County Climate
Wasco County, Oregon
Avg Annual Temp
52.0°F
Annual Precip
13.8"
Annual Snowfall
13.5"
Extreme Heat Days
41.400000000000006
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Wasco County Weather
A Bridge Between Coastal and Continental Climates
Wasco County’s 52.0°F average annual temperature sits just below the national median. This region experiences a semi-arid climate that serves as a transition zone between the wet coast and the dry interior.
Warmer and Drier Than the Oregon Average
At 52.0°F, the county is 1.5 degrees warmer than the Oregon state average of 50.5°F. It is significantly drier than the rest of the state, receiving only 13.8 inches of rain compared to the 37.4-inch state average.
A Drier Choice Than Western Neighbors
Wasco is far more arid than neighboring Hood River County to the west. While it shares a similar heat profile with Sherman County, its location near the Columbia Gorge creates unique wind and weather patterns.
Hot Summers and Snowy Winter Stints
Summers are intense with 41 days reaching 90°F or higher and a July average of 71.4°F. Residents also navigate a true winter, which brings 13.5 inches of annual snowfall and a December-February average of 36.0°F.
Prepare for Heat Waves and Winter Dustings
High-efficiency cooling is a must to handle the 41 annual extreme heat days. You should also keep snow tires or shovels ready for the 13.5 inches of snow that typically falls during the colder months.
Frequently Asked Questions
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Data source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.