Three Lakes, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.5 °C (low) to 14.8 °C (high). Annual precipitation averages 1327.4 Millimeters. Three Lakes is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.8 °C | 7.6 °C | 180.09 mm |
| February | 1.8 °C | 9 °C | 125.73 mm |
| March | 3.2 °C | 11.2 °C | 138.18 mm |
| April | 5.1 °C | 13.8 °C | 109.98 mm |
| May | 8 °C | 17.4 °C | 81.28 mm |
| June | 10.2 °C | 19.8 °C | 76.2 mm |
| July | 12.2 °C | 23.3 °C | 29.72 mm |
| August | 12.5 °C | 23.8 °C | 29.46 mm |
| September | 10.3 °C | 20.6 °C | 66.8 mm |
| October | 6.9 °C | 14.5 °C | 138.43 mm |
| November | 3.7 °C | 10 °C | 182.63 mm |
| December | 1.7 °C | 7.1 °C | 168.91 mm |
| Annual | 6.5 °C | 14.8 °C | 1327.41 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |