Hayesville, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.3 °C (low) to 17.4 °C (high). Annual precipitation averages 1054.6 Millimeters. Hayesville is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.9 °C | 8.6 °C | 150.37 mm |
| February | 2 °C | 10.6 °C | 116.59 mm |
| March | 3.2 °C | 13.2 °C | 119.89 mm |
| April | 4.8 °C | 15.8 °C | 92.2 mm |
| May | 7.7 °C | 19.8 °C | 58.67 mm |
| June | 10 °C | 22.9 °C | 37.85 mm |
| July | 12.1 °C | 27.8 °C | 8.64 mm |
| August | 11.9 °C | 28 °C | 11.68 mm |
| September | 9.9 °C | 24.7 °C | 40.13 mm |
| October | 6.6 °C | 17.8 °C | 88.9 mm |
| November | 3.8 °C | 11.6 °C | 148.34 mm |
| December | 1.6 °C | 8.1 °C | 181.36 mm |
| Annual | 6.3 °C | 17.4 °C | 1054.62 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 40-50 Days |
| Plant Hardiness Zone | Zone 8b : -9.4°C to -6.7°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |