Keno, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 31.6 °F (low) to 61.2 °F (high). Annual precipitation averages 18 Inches. Keno is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.4 °F | 40.9 °F | 2.63 in. |
| February | 22.6 °F | 45.2 °F | 1.97 in. |
| March | 26.2 °F | 50.5 °F | 1.81 in. |
| April | 28.8 °F | 56.9 °F | 1.5 in. |
| May | 35.6 °F | 66.4 °F | 1.25 in. |
| June | 40.8 °F | 74.7 °F | 0.7 in. |
| July | 46.8 °F | 85.1 °F | 0.29 in. |
| August | 45.0 °F | 84.3 °F | 0.42 in. |
| September | 38.2 °F | 77.4 °F | 0.48 in. |
| October | 30.1 °F | 64.2 °F | 1.33 in. |
| November | 24.5 °F | 48.7 °F | 2.31 in. |
| December | 20.0 °F | 40.0 °F | 3.31 in. |
| Annual | 31.6 °F | 61.2 °F | 18 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |