Arivaca Junction, Arizona has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 50.4 °F (low) to 82.6 °F (high). Annual precipitation averages 14.3 Inches. Arivaca Junction is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 34.5 °F | 66.4 °F | 0.69 in. |
| February | 36.9 °F | 68.5 °F | 0.76 in. |
| March | 41.6 °F | 74.6 °F | 0.7 in. |
| April | 45.9 °F | 81.3 °F | 0.41 in. |
| May | 53.2 °F | 89.7 °F | 0.16 in. |
| June | 63.2 °F | 98.9 °F | 0.43 in. |
| July | 70.2 °F | 97.6 °F | 3.9 in. |
| August | 69.1 °F | 95.8 °F | 3.0 in. |
| September | 63.1 °F | 92.9 °F | 1.9 in. |
| October | 51.2 °F | 85.3 °F | 0.67 in. |
| November | 41.3 °F | 74.9 °F | 0.63 in. |
| December | 34.3 °F | 65.5 °F | 1.0 in. |
| Annual | 50.4 °F | 82.6 °F | 14.25 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |