Aumsville, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 43 °F (low) to 63.1 °F (high). Annual precipitation averages 47.9 Inches. 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 | 35.0 °F | 47.2 °F | 6.67 in. |
| February | 35.2 °F | 50.9 °F | 5.2 in. |
| March | 37.5 °F | 55.5 °F | 5.27 in. |
| April | 40.6 °F | 60.4 °F | 4.36 in. |
| May | 45.5 °F | 67.3 °F | 3.01 in. |
| June | 49.7 °F | 72.9 °F | 1.82 in. |
| July | 53.4 °F | 81.5 °F | 0.48 in. |
| August | 53.1 °F | 82.0 °F | 0.5 in. |
| September | 49.3 °F | 76.2 °F | 1.82 in. |
| October | 43.5 °F | 64.0 °F | 4.11 in. |
| November | 38.6 °F | 52.5 °F | 6.92 in. |
| December | 34.6 °F | 46.3 °F | 7.78 in. |
| Annual | 43 °F | 63.1 °F | 47.94 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |