Dillard, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 43.2 °F (low) to 67 °F (high). Annual precipitation averages 34.6 Inches. Dillard is located in USDA Plant Hardiness Zone 9a. 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 | 35.4 °F | 49.5 °F | 4.92 in. |
| February | 35.8 °F | 54.0 °F | 4.29 in. |
| March | 37.4 °F | 58.8 °F | 3.86 in. |
| April | 40.3 °F | 64.4 °F | 2.59 in. |
| May | 45.3 °F | 71.7 °F | 1.98 in. |
| June | 49.9 °F | 78.0 °F | 1.0 in. |
| July | 54.3 °F | 86.8 °F | 0.23 in. |
| August | 53.5 °F | 87.2 °F | 0.33 in. |
| September | 48.6 °F | 81.9 °F | 0.9 in. |
| October | 42.7 °F | 69.2 °F | 2.42 in. |
| November | 39.4 °F | 54.9 °F | 5.14 in. |
| December | 35.4 °F | 47.8 °F | 6.91 in. |
| Annual | 43.2 °F | 67 °F | 34.57 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 9a : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |