Polk County Climate
Polk County, Oregon
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
50.1°F
Annual Precip
77.3"
Annual Snowfall
5.6"
Extreme Heat Days
10
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
1,817
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Polk County
Climate Verdict
Polk County has a mild, with an average annual temperature of 50.1°F, very wet conditions receiving 77.3 inches of precipitation annually, rare extreme heat with only 10.366666666666667 days above 90°F annually, light snow averaging 5.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 39.1°F. summers are pleasantly cool with July averaging 64.2°F. The climate is remarkably stable year-round, with only a 25°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 Polk County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Polk County closely matches the Oregon statewide average temperature of 50.5°F, it is also noticeably wetter, receiving 39.9 inches more precipitation than the state average.
Climate Profile
About Polk County Weather
Cooler and Significantly Wetter than Average
Polk County’s 50.1°F annual average is cooler than the national median. The standout metric is its 77.3 inches of annual precipitation, which is more than double the national average.
Oregon's Rain-Drenched Valley Center
The county matches the state average temperature of 50.5°F almost perfectly. However, it receives 77.3 inches of rain, which is more than twice the state average of 37.4 inches.
Wetter Than Its Northern Neighbors
Polk County is much wetter than Multnomah County, receiving nearly 30 inches more rain annually. It remains cooler than Multnomah by over four degrees on average.
Mild Summers and Very Wet Winters
Summer is mild with only 10 days of extreme heat and a July average of 64.2°F. Winters are characterized by rain rather than frozen precipitation, with only 5.6 inches of annual snowfall.
Prioritize Waterproofing and Drainage
With over 77 inches of rain, ensuring proper home drainage and gutter maintenance is critical. Residents rarely need heavy snow equipment but should invest in high-performance moisture-wicking clothing.
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.