Esparto, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 9.5 °C (low) to 24.5 °C (high). Annual precipitation averages 558 Millimeters. 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 | 3.9 °C | 13.8 °C | 118.36 mm |
| February | 5.1 °C | 16.4 °C | 117.09 mm |
| March | 6.6 °C | 19.2 °C | 75.69 mm |
| April | 8.3 °C | 22.9 °C | 33.27 mm |
| May | 11.2 °C | 27.6 °C | 20.32 mm |
| June | 14.1 °C | 31.9 °C | 4.32 mm |
| July | 15.4 °C | 35.1 °C | 0 mm |
| August | 14.8 °C | 34.7 °C | 0.76 mm |
| September | 13.8 °C | 32.7 °C | 2.29 mm |
| October | 10.6 °C | 26.8 °C | 21.84 mm |
| November | 6.3 °C | 18.9 °C | 51.82 mm |
| December | 3.8 °C | 13.8 °C | 112.27 mm |
| Annual | 9.5 °C | 24.5 °C | 558.03 mm |
| 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 : -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 |