Garden Grove, California has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 55 °F (low) to 74.8 °F (high). Annual precipitation averages 12.6 Inches. Garden Grove is located in USDA Plant Hardiness Zone 10b.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 46.7 °F | 67.6 °F | 2.95 in. |
| February | 47.9 °F | 67.5 °F | 3.26 in. |
| March | 50.2 °F | 68.7 °F | 1.81 in. |
| April | 52.6 °F | 72.8 °F | 0.62 in. |
| May | 56.7 °F | 74.4 °F | 0.28 in. |
| June | 60.4 °F | 77.3 °F | 0.08 in. |
| July | 63.7 °F | 82.0 °F | 0.05 in. |
| August | 64.4 °F | 84.3 °F | 0.0 in. |
| September | 62.5 °F | 83.7 °F | 0.11 in. |
| October | 57.8 °F | 79.6 °F | 0.49 in. |
| November | 50.9 °F | 72.6 °F | 0.74 in. |
| December | 46.1 °F | 67.3 °F | 2.18 in. |
| Annual | 55 °F | 74.8 °F | 12.57 in. |
| Average First Frost Date | No Frost |
| Average Last Frost Date | |
| Average Days With Frost | Frost Free |
| Plant Hardiness Zone | Zone 10b : 35°F to 30°F |
| Plant Hardiness Zone - 2012 | Zone 10b : 35°F to 30°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |