Aumsville, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.1 °C (low) to 17.3 °C (high). Annual precipitation averages 1217.7 Millimeters. Aumsville is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.7 °C | 8.4 °C | 169.42 mm |
| February | 1.8 °C | 10.5 °C | 132.08 mm |
| March | 3.1 °C | 13.1 °C | 133.86 mm |
| April | 4.8 °C | 15.8 °C | 110.74 mm |
| May | 7.5 °C | 19.6 °C | 76.45 mm |
| June | 9.8 °C | 22.7 °C | 46.23 mm |
| July | 11.9 °C | 27.5 °C | 12.19 mm |
| August | 11.7 °C | 27.8 °C | 12.7 mm |
| September | 9.6 °C | 24.6 °C | 46.23 mm |
| October | 6.4 °C | 17.8 °C | 104.39 mm |
| November | 3.7 °C | 11.4 °C | 175.77 mm |
| December | 1.4 °C | 7.9 °C | 197.61 mm |
| Annual | 6.1 °C | 17.3 °C | 1217.67 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 |