Valley Ranch, California has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 0.7 °C (low) to 18 °C (high). Annual precipitation averages 703.3 Millimeters. Valley Ranch is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.5 °C | 7.2 °C | 125.98 mm |
| February | -4.3 °C | 9.2 °C | 116.33 mm |
| March | -2.3 °C | 12.3 °C | 103.12 mm |
| April | -0.4 °C | 15.2 °C | 50.55 mm |
| May | 2.8 °C | 19.9 °C | 36.58 mm |
| June | 5.9 °C | 25.6 °C | 13.46 mm |
| July | 8.8 °C | 30.7 °C | 4.57 mm |
| August | 7.6 °C | 30.2 °C | 5.33 mm |
| September | 4.5 °C | 27.1 °C | 12.45 mm |
| October | 0.3 °C | 20.1 °C | 35.56 mm |
| November | -3.2 °C | 12.1 °C | 66.55 mm |
| December | -5.4 °C | 6.6 °C | 132.84 mm |
| Annual | 0.7 °C | 18 °C | 703.32 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |