Arivaca Junction, Arizona has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 10.2 °C (low) to 28.1 °C (high). Annual precipitation averages 361.9 Millimeters. 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 | 1.4 °C | 19.1 °C | 17.53 mm |
| February | 2.7 °C | 20.3 °C | 19.3 mm |
| March | 5.3 °C | 23.7 °C | 17.78 mm |
| April | 7.7 °C | 27.4 °C | 10.41 mm |
| May | 11.8 °C | 32.1 °C | 4.06 mm |
| June | 17.3 °C | 37.2 °C | 10.92 mm |
| July | 21.2 °C | 36.4 °C | 99.06 mm |
| August | 20.6 °C | 35.4 °C | 76.2 mm |
| September | 17.3 °C | 33.8 °C | 48.26 mm |
| October | 10.7 °C | 29.6 °C | 17.02 mm |
| November | 5.2 °C | 23.8 °C | 16 mm |
| December | 1.3 °C | 18.6 °C | 25.4 mm |
| Annual | 10.2 °C | 28.1 °C | 361.94 mm |
| 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 : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |