Delaware County Climate
Delaware County, Oklahoma
Avg Annual Temp
59.1°F
Annual Precip
49.5"
Annual Snowfall
—
Extreme Heat Days
49
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.