Spring Garden, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 34.7 °F (low) to 65.2 °F (high). Annual precipitation averages 46 Inches. 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 | 24.3 °F | 46.0 °F | 8.27 in. |
| February | 25.5 °F | 49.4 °F | 7.49 in. |
| March | 28.8 °F | 54.2 °F | 6.63 in. |
| April | 31.9 °F | 60.4 °F | 3.79 in. |
| May | 37.9 °F | 69.2 °F | 2.28 in. |
| June | 43.8 °F | 79.2 °F | 0.81 in. |
| July | 49.1 °F | 87.9 °F | 0.15 in. |
| August | 47.2 °F | 87.2 °F | 0.19 in. |
| September | 41.4 °F | 81.4 °F | 0.57 in. |
| October | 33.9 °F | 68.7 °F | 2.31 in. |
| November | 28.2 °F | 53.8 °F | 4.56 in. |
| December | 24.3 °F | 44.6 °F | 8.93 in. |
| Annual | 34.7 °F | 65.2 °F | 45.98 in. |
| 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 : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |