Esparto, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 49.1 °F (low) to 76.1 °F (high). Annual precipitation averages 22 Inches. Esparto is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Feb. 11 - Feb. 20 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 39.0 °F | 56.8 °F | 4.66 in. |
| February | 41.2 °F | 61.5 °F | 4.61 in. |
| March | 43.9 °F | 66.5 °F | 2.98 in. |
| April | 46.9 °F | 73.2 °F | 1.31 in. |
| May | 52.2 °F | 81.6 °F | 0.8 in. |
| June | 57.3 °F | 89.5 °F | 0.17 in. |
| July | 59.8 °F | 95.2 °F | 0.0 in. |
| August | 58.7 °F | 94.4 °F | 0.03 in. |
| September | 56.9 °F | 90.9 °F | 0.09 in. |
| October | 51.0 °F | 80.2 °F | 0.86 in. |
| November | 43.4 °F | 66.0 °F | 2.04 in. |
| December | 38.8 °F | 56.9 °F | 4.42 in. |
| Annual | 49.1 °F | 76.1 °F | 21.97 in. |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Feb. 11 - Feb. 20 |
| Average Days With Frost | 10-20 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 |