Buckhorn, California has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 7.8 °C (low) to 20.8 °C (high). Annual precipitation averages 1213.4 Millimeters. Buckhorn is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.5 °C | 11.8 °C | 218.69 mm |
| February | 2.4 °C | 12.3 °C | 203.2 mm |
| March | 3.3 °C | 14.6 °C | 186.44 mm |
| April | 4.7 °C | 17.4 °C | 105.92 mm |
| May | 8.2 °C | 22.2 °C | 69.09 mm |
| June | 12.1 °C | 27.9 °C | 15.24 mm |
| July | 16.1 °C | 32.2 °C | 1.02 mm |
| August | 15.7 °C | 32.2 °C | 4.83 mm |
| September | 13.3 °C | 29.3 °C | 9.4 mm |
| October | 9.2 °C | 22.9 °C | 65.02 mm |
| November | 4.6 °C | 15.5 °C | 112.78 mm |
| December | 2 °C | 10.9 °C | 221.74 mm |
| Annual | 7.8 °C | 20.8 °C | 1213.37 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |