Donald, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.6 °C (low) to 17.4 °C (high). Annual precipitation averages 1095.8 Millimeters. Donald is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.1 °C | 8.6 °C | 160.78 mm |
| February | 2.2 °C | 10.6 °C | 113.54 mm |
| March | 3.4 °C | 13.2 °C | 121.67 mm |
| April | 5.2 °C | 15.9 °C | 89.41 mm |
| May | 8.1 °C | 19.8 °C | 65.28 mm |
| June | 10.4 °C | 22.8 °C | 41.66 mm |
| July | 12.6 °C | 27.6 °C | 9.4 mm |
| August | 12.5 °C | 27.8 °C | 11.94 mm |
| September | 10.3 °C | 24.5 °C | 36.83 mm |
| October | 6.9 °C | 17.7 °C | 98.04 mm |
| November | 4 °C | 11.6 °C | 161.8 mm |
| December | 1.8 °C | 8.1 °C | 185.42 mm |
| Annual | 6.6 °C | 17.4 °C | 1095.77 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 30-40 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |