Carbonado, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 4.7 °C (low) to 14.4 °C (high). Annual precipitation averages 1464.6 Millimeters. Carbonado is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.3 °C | 6.5 °C | 191.26 mm |
| February | 0.3 °C | 7.8 °C | 132.84 mm |
| March | 1.3 °C | 10.2 °C | 159.77 mm |
| April | 2.9 °C | 13.1 °C | 132.33 mm |
| May | 6.1 °C | 17.1 °C | 104.39 mm |
| June | 8.5 °C | 19.7 °C | 89.15 mm |
| July | 10.6 °C | 23.5 °C | 35.31 mm |
| August | 10.8 °C | 24.3 °C | 38.86 mm |
| September | 8.6 °C | 21 °C | 61.47 mm |
| October | 4.9 °C | 14.8 °C | 141.73 mm |
| November | 2.1 °C | 8.8 °C | 204.72 mm |
| December | -0.1 °C | 6 °C | 172.72 mm |
| Annual | 4.7 °C | 14.4 °C | 1464.55 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8a : -12.2°C to -9.4°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |