Dufur, Oregon has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 38.3 °F (low) to 62.9 °F (high). Annual precipitation averages 13.6 Inches. Dufur is located in USDA Plant Hardiness Zone 7a. 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 | 27.8 °F | 41.0 °F | 2.05 in. |
| February | 29.1 °F | 46.3 °F | 1.44 in. |
| March | 32.1 °F | 53.9 °F | 1.15 in. |
| April | 36.0 °F | 61.5 °F | 1.2 in. |
| May | 41.8 °F | 70.4 °F | 1.09 in. |
| June | 47.2 °F | 76.6 °F | 0.66 in. |
| July | 51.8 °F | 86.7 °F | 0.26 in. |
| August | 51.7 °F | 86.4 °F | 0.29 in. |
| September | 45.4 °F | 79.1 °F | 0.39 in. |
| October | 37.8 °F | 64.0 °F | 1.12 in. |
| November | 31.8 °F | 48.6 °F | 1.66 in. |
| December | 27.6 °F | 40.1 °F | 2.27 in. |
| Annual | 38.3 °F | 62.9 °F | 13.58 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |