Loma Rica, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 9.7 °C (low) to 23.8 °C (high). Annual precipitation averages 762 Millimeters. Loma Rica is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 21 - Feb. 29 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 3.9 °C | 13.3 °C | 141.99 mm |
| February | 5.3 °C | 15.9 °C | 132.08 mm |
| March | 6.5 °C | 18.6 °C | 119.89 mm |
| April | 7.9 °C | 21.6 °C | 55.63 mm |
| May | 11.2 °C | 26.5 °C | 34.29 mm |
| June | 14.4 °C | 31.4 °C | 10.92 mm |
| July | 16.9 °C | 34.9 °C | 0.51 mm |
| August | 16.1 °C | 34.2 °C | 1.27 mm |
| September | 14.2 °C | 31.7 °C | 5.33 mm |
| October | 10.3 °C | 25.9 °C | 36.07 mm |
| November | 6.2 °C | 18.1 °C | 75.18 mm |
| December | 3.8 °C | 13.2 °C | 148.84 mm |
| Annual | 9.7 °C | 23.8 °C | 762 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 21 - Feb. 29 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9b : -3.9°C to -1.1°C |
| Plant Hardiness Zone - 2012 | Zone 9b : -3.9°C to -1.1°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |