Ellis County Climate
Ellis County, Oklahoma
Avg Annual Temp
57.9°F
Annual Precip
23.4"
Annual Snowfall
—
Extreme Heat Days
73.6
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Ellis County Weather
Arid Climate Above National Median
Ellis County's 57.9°F average temperature sits above the national median despite being one of the cooler counties in its region. It is very dry, averaging 23.4 inches of rain.
One of Oklahoma's Driest Counties
The county's 23.4 inches of rain is nearly 14 inches below the Oklahoma state average. Its temperature also tracks about 2.5 degrees cooler than the state mean.
Defining the Dry Western Edge
Ellis County is much drier than the central and eastern parts of the state. It shares a semi-arid profile with its neighbors on the Texas border.
Intense Sun and Dry Air
The county endures 74 days of extreme heat over 90°F each year. While official snowfall averages are unavailable, winters stay cold with a 35.5°F January mean.
Focus on Water and Insulation
Drought-resistant practices are vital given the low 23.4 inches of rain. Good home insulation helps manage the significant gap between winter lows and summer highs.
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.