Liberty Lake, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 37.4 °F (low) to 59.1 °F (high). Annual precipitation averages 19 Inches. Liberty Lake is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.4 °F | 36.4 °F | 1.86 in. |
| February | 25.6 °F | 40.9 °F | 1.74 in. |
| March | 30.0 °F | 49.5 °F | 1.9 in. |
| April | 35.0 °F | 57.5 °F | 1.81 in. |
| May | 42.5 °F | 67.4 °F | 2.11 in. |
| June | 48.3 °F | 73.7 °F | 1.63 in. |
| July | 53.2 °F | 84.4 °F | 0.55 in. |
| August | 52.5 °F | 84.6 °F | 0.69 in. |
| September | 44.9 °F | 74.7 °F | 0.88 in. |
| October | 36.5 °F | 59.4 °F | 1.55 in. |
| November | 30.3 °F | 44.5 °F | 2.22 in. |
| December | 25.1 °F | 35.8 °F | 2.1 in. |
| Annual | 37.4 °F | 59.1 °F | 19.04 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 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 |