Pateros, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 40 °F (low) to 62.5 °F (high). Annual precipitation averages 11 Inches. Pateros is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.5 °F | 34.3 °F | 1.6 in. |
| February | 26.2 °F | 41.2 °F | 1.05 in. |
| March | 32.5 °F | 53.9 °F | 1.08 in. |
| April | 38.9 °F | 64.3 °F | 0.67 in. |
| May | 46.3 °F | 74.1 °F | 0.83 in. |
| June | 52.4 °F | 80.4 °F | 0.94 in. |
| July | 58.4 °F | 90.0 °F | 0.46 in. |
| August | 57.5 °F | 88.9 °F | 0.28 in. |
| September | 49.6 °F | 79.1 °F | 0.32 in. |
| October | 39.5 °F | 62.8 °F | 0.87 in. |
| November | 31.2 °F | 45.9 °F | 1.2 in. |
| December | 24.4 °F | 34.8 °F | 1.71 in. |
| Annual | 40 °F | 62.5 °F | 11.01 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |