Tacna, Arizona has a Hot Desert Climate climate (Köppen classification: BWh). Average annual temperatures range from 57.4 °F (low) to 88 °F (high). Annual precipitation averages 3.7 Inches. Tacna is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.2 °F | 69.4 °F | 0.41 in. |
| February | 43.1 °F | 72.9 °F | 0.49 in. |
| March | 48.4 °F | 79.6 °F | 0.41 in. |
| April | 53.5 °F | 86.1 °F | 0.09 in. |
| May | 60.9 °F | 93.9 °F | 0.04 in. |
| June | 69.0 °F | 102.9 °F | 0.03 in. |
| July | 78.5 °F | 106.9 °F | 0.37 in. |
| August | 79.1 °F | 106.4 °F | 0.46 in. |
| September | 72.3 °F | 101.6 °F | 0.39 in. |
| October | 58.8 °F | 90.8 °F | 0.28 in. |
| November | 46.3 °F | 77.9 °F | 0.28 in. |
| December | 38.8 °F | 67.7 °F | 0.4 in. |
| Annual | 57.4 °F | 88 °F | 3.65 in. |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 20-30 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 | Moderate Drought |
| Köppen Climate Classification | BWh - Hot Desert Climate |