Covelo, California has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 41.8 °F (low) to 72.7 °F (high). Annual precipitation averages 43.1 Inches. Covelo is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 33.6 °F | 53.5 °F | 8.81 in. |
| February | 34.5 °F | 57.9 °F | 6.74 in. |
| March | 36.7 °F | 62.5 °F | 5.78 in. |
| April | 39.2 °F | 68.1 °F | 3.13 in. |
| May | 44.0 °F | 76.2 °F | 1.69 in. |
| June | 49.0 °F | 85.4 °F | 0.58 in. |
| July | 54.0 °F | 94.7 °F | 0.07 in. |
| August | 52.2 °F | 94.0 °F | 0.1 in. |
| September | 47.5 °F | 89.3 °F | 0.26 in. |
| October | 41.6 °F | 77.3 °F | 2.17 in. |
| November | 36.6 °F | 61.0 °F | 4.5 in. |
| December | 32.8 °F | 52.7 °F | 9.26 in. |
| Annual | 41.8 °F | 72.7 °F | 43.09 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |