Newport, Washington has a Humid Continental Climate - Dry Cool Summer climate (Köppen classification: Dsb). Average annual temperatures range from 34.4 °F (low) to 57.8 °F (high). Annual precipitation averages 26.4 Inches. Newport is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.4 °F | 33.7 °F | 3.13 in. |
| February | 23.0 °F | 39.1 °F | 2.21 in. |
| March | 27.0 °F | 48.0 °F | 2.78 in. |
| April | 32.2 °F | 57.1 °F | 2.28 in. |
| May | 39.9 °F | 68.0 °F | 2.17 in. |
| June | 45.5 °F | 73.8 °F | 2.1 in. |
| July | 49.6 °F | 84.1 °F | 1.0 in. |
| August | 48.2 °F | 84.1 °F | 0.62 in. |
| September | 40.8 °F | 73.3 °F | 0.97 in. |
| October | 33.4 °F | 57.0 °F | 2.13 in. |
| November | 28.0 °F | 41.7 °F | 3.25 in. |
| December | 22.5 °F | 33.3 °F | 3.76 in. |
| Annual | 34.4 °F | 57.8 °F | 26.4 in. |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dsb - Humid Continental Climate - Dry Cool Summer |