Eldorado, Oklahoma has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 9.4 °C (low) to 24.2 °C (high). Annual precipitation averages 664.2 Millimeters. Eldorado is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -2.9 °C | 12.1 °C | 26.42 mm |
| February | -1 °C | 14.2 °C | 27.94 mm |
| March | 3.7 °C | 19.4 °C | 46.99 mm |
| April | 8.2 °C | 24.1 °C | 59.44 mm |
| May | 14.4 °C | 28.9 °C | 102.87 mm |
| June | 19.8 °C | 33.7 °C | 89.15 mm |
| July | 21.8 °C | 36 °C | 60.2 mm |
| August | 21.2 °C | 35.6 °C | 62.99 mm |
| September | 16.8 °C | 31.2 °C | 65.02 mm |
| October | 9.8 °C | 25.1 °C | 62.74 mm |
| November | 3.1 °C | 18.1 °C | 33.02 mm |
| December | -2 °C | 12.4 °C | 27.43 mm |
| Annual | 9.4 °C | 24.2 °C | 664.21 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |