Cayuse, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 39.6 °F (low) to 63.8 °F (high). Annual precipitation averages 18.6 Inches. Cayuse is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.8 °F | 42.0 °F | 2.13 in. |
| February | 29.3 °F | 46.9 °F | 1.69 in. |
| March | 33.4 °F | 55.2 °F | 2.07 in. |
| April | 37.6 °F | 61.8 °F | 1.9 in. |
| May | 44.1 °F | 70.5 °F | 2.02 in. |
| June | 49.6 °F | 77.9 °F | 1.37 in. |
| July | 54.9 °F | 88.9 °F | 0.31 in. |
| August | 54.1 °F | 88.2 °F | 0.42 in. |
| September | 46.7 °F | 78.5 °F | 0.58 in. |
| October | 38.2 °F | 64.6 °F | 1.35 in. |
| November | 32.0 °F | 50.1 °F | 2.3 in. |
| December | 27.6 °F | 41.4 °F | 2.42 in. |
| Annual | 39.6 °F | 63.8 °F | 18.56 in. |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |