McMinnville, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.3 °C (low) to 17.5 °C (high). Annual precipitation averages 1153.7 Millimeters. McMinnville is located in USDA Plant Hardiness Zone 9a. 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 | 2.1 °C | 8.4 °C | 185.17 mm |
| February | 2.2 °C | 10.6 °C | 131.57 mm |
| March | 3.2 °C | 13.2 °C | 122.43 mm |
| April | 4.8 °C | 15.9 °C | 91.95 mm |
| May | 7.7 °C | 20 °C | 56.39 mm |
| June | 9.9 °C | 23.1 °C | 34.8 mm |
| July | 11.9 °C | 28.1 °C | 7.37 mm |
| August | 11.9 °C | 28.4 °C | 10.16 mm |
| September | 9.8 °C | 24.9 °C | 33.78 mm |
| October | 6.5 °C | 17.8 °C | 94.49 mm |
| November | 3.7 °C | 11.6 °C | 171.96 mm |
| December | 1.7 °C | 8 °C | 213.61 mm |
| Annual | 6.3 °C | 17.5 °C | 1153.68 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |