Dash Point, Washington has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.9 °C (low) to 16.1 °C (high). Annual precipitation averages 1107.7 Millimeters. Dash Point is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 1 - Mar. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.3 °C | 8.6 °C | 162.31 mm |
| February | 2.2 °C | 9.9 °C | 107.44 mm |
| March | 3.6 °C | 12.3 °C | 124.71 mm |
| April | 5.3 °C | 15.2 °C | 87.12 mm |
| May | 8.4 °C | 18.9 °C | 51.31 mm |
| June | 10.9 °C | 21.4 °C | 41.15 mm |
| July | 12.8 °C | 24.8 °C | 18.29 mm |
| August | 12.9 °C | 25 °C | 25.4 mm |
| September | 10.7 °C | 21.9 °C | 41.91 mm |
| October | 7.3 °C | 15.9 °C | 109.73 mm |
| November | 4.2 °C | 11.1 °C | 166.88 mm |
| December | 2.1 °C | 8.1 °C | 171.45 mm |
| Annual | 6.9 °C | 16.1 °C | 1107.7 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 1 - Mar. 10 |
| Average Days With Frost | 30-40 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 | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |