Leadville, Colorado has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from -6 °C (low) to 8.8 °C (high). Annual precipitation averages 502.7 Millimeters. Leadville is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Jun. 21 - Jun. 30 through the first frost around July 21 - July 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15 °C | -1.7 °C | 38.86 mm |
| February | -14.6 °C | -1.1 °C | 42.93 mm |
| March | -11.4 °C | 2.6 °C | 44.2 mm |
| April | -7.7 °C | 6.4 °C | 58.93 mm |
| May | -2.8 °C | 12 °C | 40.64 mm |
| June | 1.4 °C | 18.6 °C | 24.89 mm |
| July | 4.4 °C | 21.5 °C | 55.12 mm |
| August | 3.6 °C | 19.9 °C | 54.36 mm |
| September | 0.2 °C | 16.3 °C | 38.1 mm |
| October | -4.7 °C | 9.8 °C | 31.24 mm |
| November | -10.4 °C | 3 °C | 33.78 mm |
| December | -14.6 °C | -1.8 °C | 39.62 mm |
| Annual | -6 °C | 8.8 °C | 502.67 mm |
| Average First Frost Date | July 21 - July 31 |
| Average Last Frost Date | Jun. 21 - Jun. 30 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Exceptional Drought |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |