Dallesport, Washington has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 43.4 °F (low) to 64.9 °F (high). Annual precipitation averages 13.6 Inches. Dallesport is located in USDA Plant Hardiness Zone 8a. 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 | 31.1 °F | 42.8 °F | 2.66 in. |
| February | 31.9 °F | 48.9 °F | 1.25 in. |
| March | 35.9 °F | 56.9 °F | 1.33 in. |
| April | 41.2 °F | 63.8 °F | 0.7 in. |
| May | 48.2 °F | 72.5 °F | 0.74 in. |
| June | 54.1 °F | 78.4 °F | 0.49 in. |
| July | 59.5 °F | 87.2 °F | 0.17 in. |
| August | 59.2 °F | 87.6 °F | 0.17 in. |
| September | 51.2 °F | 80.2 °F | 0.32 in. |
| October | 42.3 °F | 66.5 °F | 1.0 in. |
| November | 35.3 °F | 51.4 °F | 1.95 in. |
| December | 31.2 °F | 42.6 °F | 2.86 in. |
| Annual | 43.4 °F | 64.9 °F | 13.64 in. |
| 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 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |