Eldorado, Texas has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 10.8 °C (low) to 25.1 °C (high). Annual precipitation averages 510.8 Millimeters. Eldorado is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.2 °C | 14.8 °C | 22.61 mm |
| February | 2.3 °C | 17.1 °C | 32.77 mm |
| March | 6.4 °C | 21.4 °C | 36.32 mm |
| April | 10.1 °C | 25.9 °C | 36.32 mm |
| May | 15.6 °C | 29.7 °C | 64.52 mm |
| June | 19.3 °C | 33.1 °C | 60.96 mm |
| July | 20.3 °C | 34.2 °C | 39.88 mm |
| August | 20 °C | 34.1 °C | 57.15 mm |
| September | 16.6 °C | 30.6 °C | 56.9 mm |
| October | 11.5 °C | 25.7 °C | 54.86 mm |
| November | 5.6 °C | 19.4 °C | 27.18 mm |
| December | 1.2 °C | 15.3 °C | 21.34 mm |
| Annual | 10.8 °C | 25.1 °C | 510.81 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8a : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |