Kerby, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 40.1 °F (low) to 69.1 °F (high). Annual precipitation averages 53.7 Inches. Kerby is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 32.5 °F | 49.0 °F | 9.64 in. |
| February | 33.0 °F | 54.7 °F | 7.3 in. |
| March | 34.4 °F | 59.3 °F | 7.59 in. |
| April | 37.1 °F | 65.1 °F | 4.25 in. |
| May | 42.3 °F | 74.1 °F | 2.09 in. |
| June | 47.1 °F | 82.1 °F | 0.79 in. |
| July | 52.1 °F | 92.6 °F | 0.31 in. |
| August | 50.2 °F | 92.2 °F | 0.2 in. |
| September | 45.0 °F | 86.0 °F | 0.64 in. |
| October | 38.8 °F | 71.5 °F | 3.52 in. |
| November | 36.0 °F | 55.0 °F | 7.95 in. |
| December | 33.0 °F | 47.1 °F | 9.44 in. |
| Annual | 40.1 °F | 69.1 °F | 53.72 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 75-100 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 | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |