Ronald, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 2 °C (low) to 12.8 °C (high). Annual precipitation averages 1043.9 Millimeters. Ronald is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -4.4 °C | 1.6 °C | 170.43 mm |
| February | -4.4 °C | 4.1 °C | 121.92 mm |
| March | -2.4 °C | 7.7 °C | 88.9 mm |
| April | 0.3 °C | 11.6 °C | 55.12 mm |
| May | 4.2 °C | 16.6 °C | 42.93 mm |
| June | 7.8 °C | 19.8 °C | 26.92 mm |
| July | 10.9 °C | 25.1 °C | 15.49 mm |
| August | 10.4 °C | 25.7 °C | 10.92 mm |
| September | 6.3 °C | 21.4 °C | 33.02 mm |
| October | 1.8 °C | 13.4 °C | 110.24 mm |
| November | -2 °C | 5.6 °C | 164.85 mm |
| December | -4.7 °C | 1.2 °C | 203.2 mm |
| Annual | 2 °C | 12.8 °C | 1043.94 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 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 | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |