Weston, Oregon has a Hot-Summer Mediterranean Climate climate (Köppen classification: Csa). Average annual temperatures range from 4.1 °C (low) to 16.6 °C (high). Annual precipitation averages 600.5 Millimeters. 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 | -2.6 °C | 4.6 °C | 68.33 mm |
| February | -1.7 °C | 7.2 °C | 57.66 mm |
| March | 0.6 °C | 11.6 °C | 68.33 mm |
| April | 2.8 °C | 15.6 °C | 63.75 mm |
| May | 6.4 °C | 20.4 °C | 60.96 mm |
| June | 9.2 °C | 24.4 °C | 42.67 mm |
| July | 12.4 °C | 30.4 °C | 10.16 mm |
| August | 12.2 °C | 30.2 °C | 12.95 mm |
| September | 8.6 °C | 24.8 °C | 20.57 mm |
| October | 3.8 °C | 17 °C | 44.45 mm |
| November | -0.1 °C | 8.8 °C | 73.91 mm |
| December | -2.7 °C | 4.2 °C | 76.71 mm |
| Annual | 4.1 °C | 16.6 °C | 600.45 mm |
| 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 : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Csa - Hot-Summer Mediterranean Climate |