Cascadia, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 41.1 °F (low) to 61.2 °F (high). Annual precipitation averages 63.9 Inches. 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 | 33.5 °F | 45.7 °F | 8.08 in. |
| February | 33.8 °F | 49.6 °F | 6.37 in. |
| March | 35.6 °F | 54.1 °F | 7.06 in. |
| April | 38.5 °F | 58.4 °F | 6.74 in. |
| May | 43.7 °F | 65.1 °F | 4.62 in. |
| June | 47.8 °F | 70.7 °F | 3.12 in. |
| July | 51.4 °F | 79.2 °F | 0.64 in. |
| August | 50.5 °F | 79.8 °F | 0.82 in. |
| September | 46.6 °F | 74.1 °F | 2.34 in. |
| October | 41.6 °F | 62.2 °F | 5.36 in. |
| November | 36.9 °F | 51.0 °F | 9.14 in. |
| December | 33.4 °F | 44.4 °F | 9.61 in. |
| Annual | 41.1 °F | 61.2 °F | 63.9 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |