Delaware County Climate
Delaware County, Oklahoma
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
59.1°F
Annual Precip
49.5"
Annual Snowfall
—
Extreme Heat Days
49
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7a
Minimum winter temperature range for plant survival
4,654
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Delaware County
Climate Verdict
Delaware County has a mild, with an average annual temperature of 59.1°F, moderately wet with 49.5 inches of annual precipitation, occasional hot days — 49 per year above 90°F. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 37.3°F. summers are warm — July averages 79.8°F. The 42°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Delaware County closely matches the Oklahoma statewide average temperature of 60.4°F, it is also noticeably wetter, receiving 12.3 inches more precipitation than the state average, the county experiences 27.41094907407411 fewer extreme heat days than the state average.
Climate Profile
About Delaware County Weather
Temperate Warmth and Heavy Rain
Delaware County averages 59.1°F annually, staying warmer than the national median. It is significantly wetter than most U.S. counties, receiving 49.5 inches of rain.
The Rain Capital of Oklahoma
The county is one of the wettest in the state, exceeding the Oklahoma average precipitation by over 12 inches. It is slightly cooler than the 60.4°F state mean.
Wetter and Milder Than Central Oklahoma
Delaware County experiences far more rainfall than its neighbors to the west. Its summer heat is also less frequent, with only 49 extreme heat days.
Mild Summers and Wet Winters
Summer averages stay under 80°F, providing a break from the more intense Oklahoma heat. While annual snowfall data is currently unavailable, the 37.3°F January suggests chilly winters.
Invest in Rain and Mold Prevention
With nearly 50 inches of annual rain, moisture control and gutter maintenance are critical. Outdoor planning is easier here than in hotter counties with fewer extreme heat days.
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.