Five Corners, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.4 °C (low) to 16.9 °C (high). Annual precipitation averages 1159.5 Millimeters. Five Corners is located in USDA Plant Hardiness Zone 8b. 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 | 1.6 °C | 8.2 °C | 162.56 mm |
| February | 1.6 °C | 10.3 °C | 115.57 mm |
| March | 3.1 °C | 13 °C | 129.03 mm |
| April | 5 °C | 15.7 °C | 95.76 mm |
| May | 8.1 °C | 19.6 °C | 75.44 mm |
| June | 10.3 °C | 22.2 °C | 52.32 mm |
| July | 12.6 °C | 26.4 °C | 14.73 mm |
| August | 12.6 °C | 27 °C | 15.75 mm |
| September | 10.1 °C | 23.8 °C | 46.74 mm |
| October | 6.6 °C | 17.4 °C | 106.93 mm |
| November | 3.6 °C | 11.4 °C | 162.81 mm |
| December | 1.4 °C | 7.7 °C | 181.86 mm |
| Annual | 6.4 °C | 16.9 °C | 1159.5 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |