Connell, Washington has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 39.5 °F (low) to 63.5 °F (high). Annual precipitation averages 8.9 Inches. Connell is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 26.5 °F | 38.6 °F | 1.13 in. |
| February | 28.3 °F | 45.7 °F | 0.87 in. |
| March | 32.6 °F | 55.4 °F | 0.95 in. |
| April | 37.1 °F | 63.7 °F | 0.76 in. |
| May | 44.1 °F | 73.0 °F | 0.75 in. |
| June | 49.9 °F | 79.6 °F | 0.63 in. |
| July | 55.6 °F | 89.0 °F | 0.23 in. |
| August | 55.1 °F | 88.2 °F | 0.2 in. |
| September | 47.9 °F | 78.8 °F | 0.29 in. |
| October | 38.8 °F | 63.9 °F | 0.76 in. |
| November | 31.3 °F | 48.1 °F | 1.13 in. |
| December | 26.2 °F | 38.0 °F | 1.18 in. |
| Annual | 39.5 °F | 63.5 °F | 8.88 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |