Cascadia, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 5.1 °C (low) to 16.2 °C (high). Annual precipitation averages 1623.1 Millimeters. Cascadia is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 0.8 °C | 7.6 °C | 205.23 mm |
| February | 1 °C | 9.8 °C | 161.8 mm |
| March | 2 °C | 12.3 °C | 179.32 mm |
| April | 3.6 °C | 14.7 °C | 171.2 mm |
| May | 6.5 °C | 18.4 °C | 117.35 mm |
| June | 8.8 °C | 21.5 °C | 79.25 mm |
| July | 10.8 °C | 26.2 °C | 16.26 mm |
| August | 10.3 °C | 26.6 °C | 20.83 mm |
| September | 8.1 °C | 23.4 °C | 59.44 mm |
| October | 5.3 °C | 16.8 °C | 136.14 mm |
| November | 2.7 °C | 10.6 °C | 232.16 mm |
| December | 0.8 °C | 6.9 °C | 244.09 mm |
| Annual | 5.1 °C | 16.2 °C | 1623.07 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 50-75 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 | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |