Corvallis, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 42.6 °F (low) to 63.4 °F (high). Annual precipitation averages 41.2 Inches. Corvallis is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.1 °F | 47.4 °F | 6.26 in. |
| February | 35.3 °F | 51.2 °F | 4.8 in. |
| March | 37.3 °F | 55.9 °F | 4.74 in. |
| April | 40.2 °F | 60.6 °F | 3.25 in. |
| May | 45.0 °F | 67.5 °F | 2.1 in. |
| June | 49.0 °F | 73.2 °F | 1.34 in. |
| July | 52.8 °F | 81.9 °F | 0.32 in. |
| August | 52.5 °F | 82.6 °F | 0.38 in. |
| September | 48.6 °F | 76.8 °F | 1.33 in. |
| October | 42.8 °F | 64.3 °F | 3.26 in. |
| November | 38.4 °F | 53.0 °F | 6.05 in. |
| December | 34.7 °F | 46.4 °F | 7.4 in. |
| Annual | 42.6 °F | 63.4 °F | 41.23 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 50-75 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 |