Cleone, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 7.7 °C (low) to 16 °C (high). Annual precipitation averages 1049.3 Millimeters. Cleone is located in USDA Plant Hardiness Zone 9b. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Dec. 1 - Dec. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 5.9 °C | 13.1 °C | 184.66 mm |
| February | 5.8 °C | 13.3 °C | 160.27 mm |
| March | 6.1 °C | 13.9 °C | 156.46 mm |
| April | 6.6 °C | 15.2 °C | 84.07 mm |
| May | 7.9 °C | 16.4 °C | 40.89 mm |
| June | 9.1 °C | 17.9 °C | 17.53 mm |
| July | 9.8 °C | 18.5 °C | 2.54 mm |
| August | 10.1 °C | 19 °C | 3.05 mm |
| September | 9.7 °C | 19.2 °C | 7.37 mm |
| October | 8.6 °C | 17.9 °C | 59.18 mm |
| November | 7.1 °C | 14.8 °C | 114.05 mm |
| December | 5.6 °C | 13.3 °C | 219.2 mm |
| Annual | 7.7 °C | 16 °C | 1049.27 mm |
| Average First Frost Date | Dec. 1 - Dec. 10 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| 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 | Csb - Warm-Summer Mediterranean Climate |