Morrow County Climate
Morrow County, Oregon
Avg Annual Temp
52.8°F
Annual Precip
10.8"
Annual Snowfall
8.3"
Extreme Heat Days
37.099999999999994
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Morrow County Weather
A Warm and Arid Plateau Climate
Morrow County averages 52.8°F annually, placing it very close to the national median temperature. This semi-arid region receives only 10.8 inches of rain each year, far below the national average for moisture.
Surpassing Oregon's Average Temperatures
The county is significantly warmer than the Oregon state average of 50.5°F. While much of the state deals with heavy rainfall, Morrow remains one of the drier and warmer pockets in the Pacific Northwest.
Warmer and Drier Than Its Neighbors
Morrow’s 52.8°F average exceeds neighbor Sherman County at 49.2°F and Umatilla County at 51.9°F. It records roughly 4 inches less annual precipitation than Umatilla, highlighting its position in the rain shadow.
Scorching Summers and Light Winter Snow
Residents face 37 extreme heat days above 90°F annually, driven by a July average of 73.3°F. Winters stay relatively mild with 8.3 inches of snow and a January average of 35.5°F.
Prepare for Heat and Low Moisture
Central air conditioning is essential here to manage more than a month of extreme summer heat. Gardeners should prioritize drought-tolerant landscaping since the county receives 26 inches less rain than the state average.
Frequently Asked Questions
What is the average temperature in Morrow County?
How much rain does Morrow County get?
Does it snow in Morrow County?
How hot does Morrow County get in summer?
How cold are winters in Morrow County?
Track your own weather in Morrow County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.