Conconully, Washington has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 35.2 °F (low) to 57.2 °F (high). Annual precipitation averages 15.5 Inches. Conconully is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 16.4 °F | 31.9 °F | 1.54 in. |
| February | 19.3 °F | 38.2 °F | 1.36 in. |
| March | 27.3 °F | 47.3 °F | 1.47 in. |
| April | 34.6 °F | 57.4 °F | 0.96 in. |
| May | 42.7 °F | 67.1 °F | 1.69 in. |
| June | 48.0 °F | 73.5 °F | 1.65 in. |
| July | 54.0 °F | 83.3 °F | 0.87 in. |
| August | 54.0 °F | 83.2 °F | 0.51 in. |
| September | 46.7 °F | 73.8 °F | 0.67 in. |
| October | 35.9 °F | 57.4 °F | 1.16 in. |
| November | 25.7 °F | 41.3 °F | 1.71 in. |
| December | 17.3 °F | 31.4 °F | 1.94 in. |
| Annual | 35.2 °F | 57.2 °F | 15.53 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |