Cascade Locks, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.9 °C (low) to 16.5 °C (high). Annual precipitation averages 2006.6 Millimeters. Cascade Locks is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Mar. 11 - Mar. 20 through the first frost around Nov. 21 - Nov. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 1.4 °C | 6.3 °C | 300.99 mm |
| February | 1.8 °C | 9 °C | 211.58 mm |
| March | 3.2 °C | 12.4 °C | 233.43 mm |
| April | 5.4 °C | 15.7 °C | 160.78 mm |
| May | 8.6 °C | 19.8 °C | 96.77 mm |
| June | 11.1 °C | 22.5 °C | 66.04 mm |
| July | 13.7 °C | 26.9 °C | 14.73 mm |
| August | 13.7 °C | 27.4 °C | 18.54 mm |
| September | 11 °C | 24.2 °C | 60.71 mm |
| October | 7.7 °C | 17.5 °C | 185.93 mm |
| November | 4.2 °C | 10.5 °C | 308.36 mm |
| December | 1.5 °C | 6.3 °C | 348.74 mm |
| Annual | 6.9 °C | 16.5 °C | 2006.6 mm |
| Average First Frost Date | Nov. 21 - Nov. 30 |
| Average Last Frost Date | Mar. 11 - Mar. 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 | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |