Loma Rica, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 49.5 °F (low) to 74.8 °F (high). Annual precipitation averages 30 Inches. 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 | 39.0 °F | 55.9 °F | 5.59 in. |
| February | 41.5 °F | 60.7 °F | 5.2 in. |
| March | 43.7 °F | 65.4 °F | 4.72 in. |
| April | 46.3 °F | 70.8 °F | 2.19 in. |
| May | 52.2 °F | 79.7 °F | 1.35 in. |
| June | 57.9 °F | 88.5 °F | 0.43 in. |
| July | 62.4 °F | 94.8 °F | 0.02 in. |
| August | 60.9 °F | 93.5 °F | 0.05 in. |
| September | 57.5 °F | 89.1 °F | 0.21 in. |
| October | 50.6 °F | 78.7 °F | 1.42 in. |
| November | 43.2 °F | 64.5 °F | 2.96 in. |
| December | 38.8 °F | 55.8 °F | 5.86 in. |
| Annual | 49.5 °F | 74.8 °F | 30 in. |
| 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 : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 9b : 25°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |