Malheur County Climate
Malheur County, Oregon
Avg Annual Temp
50.3°F
Annual Precip
9.9"
Annual Snowfall
9.9"
Extreme Heat Days
54.575
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.