Joshua Tree, California has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 50.6 °F (low) to 79.9 °F (high). Annual precipitation averages 6 Inches. Joshua Tree is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.8 °F | 61.0 °F | 1.2 in. |
| February | 37.3 °F | 63.8 °F | 1.25 in. |
| March | 41.9 °F | 70.1 °F | 0.69 in. |
| April | 46.8 °F | 77.1 °F | 0.25 in. |
| May | 54.1 °F | 86.1 °F | 0.09 in. |
| June | 62.2 °F | 95.6 °F | 0.04 in. |
| July | 69.9 °F | 100.5 °F | 0.3 in. |
| August | 69.3 °F | 99.6 °F | 0.31 in. |
| September | 62.7 °F | 93.6 °F | 0.3 in. |
| October | 51.5 °F | 81.9 °F | 0.39 in. |
| November | 41.5 °F | 69.6 °F | 0.32 in. |
| December | 34.7 °F | 59.5 °F | 0.85 in. |
| Annual | 50.6 °F | 79.9 °F | 5.99 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 9a : 20°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |