Malo, Washington has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.4 °C (low) to 14 °C (high). Annual precipitation averages 453.9 Millimeters. Malo is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.3 °C | -0.8 °C | 45.72 mm |
| February | -6.4 °C | 3.2 °C | 36.07 mm |
| March | -3.6 °C | 9.1 °C | 35.31 mm |
| April | -0.8 °C | 14.7 °C | 34.54 mm |
| May | 3.8 °C | 20.2 °C | 56.9 mm |
| June | 7.1 °C | 23.2 °C | 56.9 mm |
| July | 9.2 °C | 28.7 °C | 25.65 mm |
| August | 8.7 °C | 28.8 °C | 16.26 mm |
| September | 4.9 °C | 23.4 °C | 21.84 mm |
| October | 0 °C | 13.8 °C | 27.69 mm |
| November | -4 °C | 4.4 °C | 44.96 mm |
| December | -7.3 °C | -0.7 °C | 52.07 mm |
| Annual | 0.4 °C | 14 °C | 453.91 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |