Spring Valley, Arizona has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 9.2 °C (low) to 24.5 °C (high). Annual precipitation averages 389.9 Millimeters. Spring Valley 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 | 1.2 °C | 14.6 °C | 46.23 mm |
| February | 1.9 °C | 15.7 °C | 49.28 mm |
| March | 4.1 °C | 18.9 °C | 41.15 mm |
| April | 6.5 °C | 22.9 °C | 11.18 mm |
| May | 10.7 °C | 27.8 °C | 8.89 mm |
| June | 15.5 °C | 33.7 °C | 5.84 mm |
| July | 19.6 °C | 35.3 °C | 53.85 mm |
| August | 19.2 °C | 34.2 °C | 41.91 mm |
| September | 15.9 °C | 31.4 °C | 30.48 mm |
| October | 10.2 °C | 25.8 °C | 27.18 mm |
| November | 4.8 °C | 19.4 °C | 31.75 mm |
| December | 1 °C | 14 °C | 42.16 mm |
| Annual | 9.2 °C | 24.5 °C | 389.9 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 | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |