Donald, Washington has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 3.9 °C (low) to 17.8 °C (high). Annual precipitation averages 205.2 Millimeters. Donald 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 Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.8 °C | 3.9 °C | 28.45 mm |
| February | -2.6 °C | 8.4 °C | 17.78 mm |
| March | 0.2 °C | 13.4 °C | 14.48 mm |
| April | 3.1 °C | 17.8 °C | 13.97 mm |
| May | 7.4 °C | 23 °C | 20.83 mm |
| June | 10.5 °C | 26.6 °C | 15.24 mm |
| July | 13.7 °C | 31.6 °C | 6.35 mm |
| August | 12.8 °C | 31 °C | 5.08 mm |
| September | 8.3 °C | 26.2 °C | 6.86 mm |
| October | 3.1 °C | 18.2 °C | 18.54 mm |
| November | -1.5 °C | 9.7 °C | 22.61 mm |
| December | -4.2 °C | 3.4 °C | 35.05 mm |
| Annual | 3.9 °C | 17.8 °C | 205.24 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |