Dewey County Climate
Dewey County, Oklahoma
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
58.0°F
Annual Precip
27.7"
Annual Snowfall
7.9"
Extreme Heat Days
85
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
4,615
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Dewey County
Climate Verdict
Dewey County has a mild, with an average annual temperature of 58.0°F, moderate rainfall of 27.7 inches per year, significant summer heat with 84.5 days annually above 90°F, light snow averaging 7.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 35.4°F. summers are hot, with July averaging 81.5°F. The 46°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Dewey County closely matches the Oklahoma statewide average temperature of 60.4°F, it is also noticeably drier, receiving 9.5 inches less precipitation than the state average.
Climate Profile
About Dewey County Weather
Warm and Relatively Arid Profile
Dewey County's 58.0°F average is warmer than the national median but cooler than much of Oklahoma. It receives only 27.7 inches of rain annually.
Cooler and Drier Than State Norms
At 58.0°F, Dewey is cooler than the 60.4°F state average. It also faces a significant rain deficit compared to the 37.2-inch state average.
Snowier Than Its Southern Neighbors
The county records 7.9 inches of annual snowfall, which is higher than many nearby regions. Its dry climate is typical of northwestern Oklahoma.
Hot Summers with Cold Winters
Dewey County sees 85 days of temperatures above 90°F. Winter averages are a cold 36.6°F, marking it as a region of wide seasonal swings.
Prepare for Wide Temperature Extremes
Homeowners must plan for 81.5°F July peaks and the 7.9 inches of snow. Winterize pipes and maintain reliable heating for the colder-than-average winters.
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.