Oakland, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.3 °C (low) to 18.7 °C (high). Annual precipitation averages 990.8 Millimeters. Oakland is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2 °C | 9.6 °C | 153.67 mm |
| February | 2.2 °C | 11.9 °C | 103.89 mm |
| March | 3.1 °C | 14.5 °C | 109.47 mm |
| April | 4.7 °C | 16.9 °C | 80.26 mm |
| May | 7.4 °C | 20.8 °C | 60.45 mm |
| June | 9.9 °C | 24.3 °C | 27.43 mm |
| July | 12.1 °C | 29.2 °C | 9.65 mm |
| August | 11.8 °C | 29.8 °C | 9.4 mm |
| September | 9.4 °C | 26.5 °C | 26.92 mm |
| October | 6.3 °C | 19.3 °C | 79.5 mm |
| November | 4.2 °C | 12.6 °C | 148.84 mm |
| December | 2 °C | 8.8 °C | 181.36 mm |
| Annual | 6.3 °C | 18.7 °C | 990.84 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 30-40 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 | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |