La Junta, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 37.3 °F (low) to 70 °F (high). Annual precipitation averages 13.2 Inches. La Junta is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.0 °F | 47.1 °F | 0.43 in. |
| February | 18.6 °F | 50.5 °F | 0.43 in. |
| March | 26.8 °F | 61.2 °F | 0.93 in. |
| April | 35.4 °F | 68.5 °F | 1.32 in. |
| May | 46.1 °F | 77.9 °F | 1.71 in. |
| June | 56.9 °F | 89.2 °F | 1.39 in. |
| July | 61.9 °F | 93.6 °F | 2.23 in. |
| August | 60.0 °F | 91.2 °F | 1.7 in. |
| September | 50.6 °F | 84.1 °F | 0.86 in. |
| October | 36.3 °F | 71.3 °F | 1.29 in. |
| November | 24.4 °F | 57.7 °F | 0.4 in. |
| December | 15.7 °F | 47.2 °F | 0.53 in. |
| Annual | 37.3 °F | 70 °F | 13.22 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |