Sierra Vista, Arizona has a Hot Semi-Arid Climate climate (Köppen classification: BSh). Average annual temperatures range from 9.1 °C (low) to 25 °C (high). Annual precipitation averages 349.2 Millimeters. Sierra Vista is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.6 °C | 16.2 °C | 21.84 mm |
| February | 2.1 °C | 17.6 °C | 16 mm |
| March | 4.4 °C | 20.8 °C | 14.73 mm |
| April | 7.1 °C | 24.8 °C | 5.33 mm |
| May | 11.3 °C | 29.1 °C | 4.32 mm |
| June | 16.9 °C | 33.9 °C | 10.92 mm |
| July | 18.8 °C | 32.9 °C | 84.58 mm |
| August | 18.1 °C | 31.7 °C | 93.47 mm |
| September | 15.4 °C | 30.3 °C | 44.7 mm |
| October | 9.9 °C | 26.4 °C | 17.27 mm |
| November | 4.4 °C | 20.9 °C | 14.22 mm |
| December | 0.7 °C | 15.8 °C | 21.84 mm |
| Annual | 9.1 °C | 25 °C | 349.22 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSh - Hot Semi-Arid Climate |