Gorst, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.7 °C (low) to 16 °C (high). Annual precipitation averages 1325.1 Millimeters. Gorst is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.2 °C | 8.3 °C | 205.74 mm |
| February | 2.1 °C | 9.8 °C | 126.75 mm |
| March | 3.4 °C | 12.1 °C | 143.51 mm |
| April | 5.1 °C | 15 °C | 92.71 mm |
| May | 8.2 °C | 19 °C | 54.61 mm |
| June | 10.6 °C | 21.3 °C | 40.64 mm |
| July | 12.5 °C | 24.9 °C | 21.34 mm |
| August | 12.6 °C | 25.1 °C | 27.69 mm |
| September | 10.6 °C | 22 °C | 49.02 mm |
| October | 7.2 °C | 15.3 °C | 125.48 mm |
| November | 3.9 °C | 10.8 °C | 212.34 mm |
| December | 2 °C | 7.8 °C | 225.3 mm |
| Annual | 6.7 °C | 16 °C | 1325.13 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |