Lompico, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 46 °F (low) to 71.6 °F (high). Annual precipitation averages 49.3 Inches. Lompico is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 40.1 °F | 59.6 °F | 10.66 in. |
| February | 41.1 °F | 61.1 °F | 10.72 in. |
| March | 42.2 °F | 65.0 °F | 6.49 in. |
| April | 43.5 °F | 69.8 °F | 2.65 in. |
| May | 46.8 °F | 73.6 °F | 1.17 in. |
| June | 49.5 °F | 79.3 °F | 0.29 in. |
| July | 52.9 °F | 84.1 °F | 0.02 in. |
| August | 52.8 °F | 84.4 °F | 0.06 in. |
| September | 51.8 °F | 82.4 °F | 0.16 in. |
| October | 48.0 °F | 76.4 °F | 2.01 in. |
| November | 43.5 °F | 65.4 °F | 4.34 in. |
| December | 40.0 °F | 58.4 °F | 10.74 in. |
| Annual | 46 °F | 71.6 °F | 49.31 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 9b : 25°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 10a : 30°F to 25°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |