Yamhill County Climate
Yamhill County, Oregon
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
53.2°F
Annual Precip
52.3"
Annual Snowfall
7.2"
Extreme Heat Days
18
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
2,366
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Yamhill County
Climate Verdict
Yamhill County has a mild, with an average annual temperature of 53.2°F, moderately wet with 52.3 inches of annual precipitation, rare extreme heat with only 17.666666666666664 days above 90°F annually, light snow averaging 7.2 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 40.9°F. summers are pleasantly cool with July averaging 68.0°F. The climate is remarkably stable year-round, with only a 27°F difference between January and July. December is typically the coldest month and August the warmest.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Yamhill County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Yamhill County closely matches the Oregon statewide average temperature of 50.5°F, it is also noticeably wetter, receiving 14.9 inches more precipitation than the state average.
Climate Profile
About Yamhill County Weather
A Classic Maritime Climate Profile
Yamhill County’s 53.2°F average annual temperature sits right at the national median. The region is defined by a Mediterranean-style cycle of wet winters and dry, warm summers.
Warm and Exceptionally Wet
The county is nearly 3 degrees warmer than the Oregon state average of 50.5°F. It is significantly wetter than the rest of the state, averaging 52.3 inches of rain compared to the 37.4-inch state average.
The Heart of Wine Country Weather
Yamhill is notably wetter than its neighbor Washington County, receiving about 11 more inches of rain per year. This extra moisture and mild 53.2°F temperature make it a premier region for viticulture.
Lush Winters and Mild Harvest Summers
July is comfortable at 68.0°F with 18 days of extreme heat annually. Winters are chilly and damp, averaging 41.3°F and producing 7.2 inches of snowfall alongside heavy seasonal rains.
Prepare for Persistent Seasonal Rainfall
Invest in heavy-duty rain gear and ensure your property has excellent drainage to handle 52.3 inches of rain. While winters average 41.3°F, keep a shovel ready for the 7.2 inches of snow that usually arrives.
Frequently Asked Questions
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.