Weston, Oregon has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 39.4 °F (low) to 61.8 °F (high). Annual precipitation averages 23.6 Inches. Weston is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.4 °F | 40.2 °F | 2.69 in. |
| February | 29.0 °F | 44.9 °F | 2.27 in. |
| March | 33.0 °F | 52.9 °F | 2.69 in. |
| April | 37.1 °F | 60.0 °F | 2.51 in. |
| May | 43.6 °F | 68.7 °F | 2.4 in. |
| June | 48.6 °F | 75.9 °F | 1.68 in. |
| July | 54.4 °F | 86.7 °F | 0.4 in. |
| August | 53.9 °F | 86.3 °F | 0.51 in. |
| September | 47.5 °F | 76.6 °F | 0.81 in. |
| October | 38.8 °F | 62.6 °F | 1.75 in. |
| November | 31.9 °F | 47.8 °F | 2.91 in. |
| December | 27.2 °F | 39.5 °F | 3.02 in. |
| Annual | 39.4 °F | 61.8 °F | 23.64 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |