Malheur County Climate
Malheur County, Oregon
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
50.3°F
Annual Precip
9.9"
Annual Snowfall
9.9"
Extreme Heat Days
55
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
2,663
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Malheur County
Climate Verdict
Malheur County has a mild, with an average annual temperature of 50.3°F, arid conditions receiving just 9.9 inches of precipitation annually, occasional hot days — 54.574999999999996 per year above 90°F, light snow averaging 9.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 30.2°F. summers are warm — July averages 73.8°F. The 44°F seasonal variation provides noticeable but manageable change. December is typically the coldest month and July the warmest.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Malheur County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Malheur County closely matches the Oregon statewide average temperature of 50.5°F, it is also noticeably drier, receiving 27.5 inches less precipitation than the state average, the county experiences 31.237085576460576 more extreme heat days than the state average.
Climate Profile
About Malheur County Weather
Arid Climate with Hot Summer Peaks
Malheur County's 50.3°F average annual temperature is just below the national median. However, its extremely low precipitation makes it one of the driest regions in the nation.
Oregon's Hotspot for Extreme Heat
Malheur averages 55 days of heat over 90°F, far more than most of the state. It also receives only 9.9 inches of rain, making it much drier than the 37.4-inch state average.
Warmer and Drier Than Lake County
Malheur is warmer than neighboring Lake County by nearly 4 degrees on average. It also experiences over twice as many extreme heat days as Lake County.
Intense Summers and Cold Winters
July averages a hot 73.8°F, and the county faces nearly two months of extreme heat. Winters are cold and dry, averaging 31.7°F with 9.9 inches of annual snowfall.
Focus on Cooling and Irrigation
With 55 days of extreme heat, robust air conditioning and hydration plans are essential for safety. The arid 9.9 inches of rain means outdoor landscaping requires drought-resistant plants.
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.