Eldora, Colorado has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from -3.4 °C (low) to 10.9 °C (high). Annual precipitation averages 676.9 Millimeters. Eldora is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.1 - Sep. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.3 °C | 0.3 °C | 45.21 mm |
| February | -10.8 °C | 1.2 °C | 50.55 mm |
| March | -8.2 °C | 5.3 °C | 67.56 mm |
| April | -5.4 °C | 8.8 °C | 92.71 mm |
| May | -0.8 °C | 13.6 °C | 77.72 mm |
| June | 3.3 °C | 20.2 °C | 44.45 mm |
| July | 6.7 °C | 23.5 °C | 66.04 mm |
| August | 5.7 °C | 22.2 °C | 53.85 mm |
| September | 2.2 °C | 18.7 °C | 46.74 mm |
| October | -2.7 °C | 11.8 °C | 43.43 mm |
| November | -7.8 °C | 5 °C | 43.69 mm |
| December | -11.2 °C | 0.4 °C | 44.96 mm |
| Annual | -3.4 °C | 10.9 °C | 676.91 mm |
| Average First Frost Date | Sep.1 - Sep. 10 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |