Walden, Colorado has a Subarctic With Cool Summers And Year Around Rainfall climate (Köppen classification: Dfc). Average annual temperatures range from 22.9 °F (low) to 52 °F (high). Annual precipitation averages 12.9 Inches. Walden is located in USDA Plant Hardiness Zone 4a. The growing season typically runs from the last frost around Jun. 11 - Jun. 20 through the first frost around July 21 - July 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.9 °F | 29.2 °F | 0.85 in. |
| February | 7.5 °F | 31.5 °F | 0.91 in. |
| March | 15.4 °F | 40.2 °F | 0.74 in. |
| April | 22.1 °F | 48.8 °F | 1.18 in. |
| May | 29.8 °F | 59.1 °F | 1.5 in. |
| June | 36.8 °F | 70.2 °F | 1.15 in. |
| July | 41.2 °F | 77.2 °F | 1.35 in. |
| August | 38.8 °F | 75.5 °F | 1.26 in. |
| September | 31.9 °F | 67.9 °F | 1.34 in. |
| October | 23.6 °F | 54.5 °F | 1.0 in. |
| November | 14.9 °F | 39.8 °F | 0.84 in. |
| December | 6.4 °F | 29.5 °F | 0.81 in. |
| Annual | 22.9 °F | 52 °F | 12.93 in. |
| Average First Frost Date | July 21 - July 31 |
| Average Last Frost Date | Jun. 11 - Jun. 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 4a : -30°F to -25°F |
| Plant Hardiness Zone - 2012 | Zone 4a : -30°F to -25°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfc - Subarctic With Cool Summers And Year Around Rainfall |