Spring Garden, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 1.5 °C (low) to 18.4 °C (high). Annual precipitation averages 1167.9 Millimeters. Spring Garden is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.3 °C | 7.8 °C | 210.06 mm |
| February | -3.6 °C | 9.7 °C | 190.25 mm |
| March | -1.8 °C | 12.3 °C | 168.4 mm |
| April | -0.1 °C | 15.8 °C | 96.27 mm |
| May | 3.3 °C | 20.7 °C | 57.91 mm |
| June | 6.6 °C | 26.2 °C | 20.57 mm |
| July | 9.5 °C | 31.1 °C | 3.81 mm |
| August | 8.4 °C | 30.7 °C | 4.83 mm |
| September | 5.2 °C | 27.4 °C | 14.48 mm |
| October | 1.1 °C | 20.4 °C | 58.67 mm |
| November | -2.1 °C | 12.1 °C | 115.82 mm |
| December | -4.3 °C | 7 °C | 226.82 mm |
| Annual | 1.5 °C | 18.4 °C | 1167.89 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |