Cascade Locks, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 44.5 °F (low) to 61.8 °F (high). Annual precipitation averages 79 Inches. 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 | 34.5 °F | 43.4 °F | 11.85 in. |
| February | 35.3 °F | 48.2 °F | 8.33 in. |
| March | 37.8 °F | 54.3 °F | 9.19 in. |
| April | 41.8 °F | 60.2 °F | 6.33 in. |
| May | 47.4 °F | 67.7 °F | 3.81 in. |
| June | 52.0 °F | 72.5 °F | 2.6 in. |
| July | 56.6 °F | 80.4 °F | 0.58 in. |
| August | 56.7 °F | 81.4 °F | 0.73 in. |
| September | 51.8 °F | 75.5 °F | 2.39 in. |
| October | 45.8 °F | 63.5 °F | 7.32 in. |
| November | 39.5 °F | 50.9 °F | 12.14 in. |
| December | 34.7 °F | 43.4 °F | 13.73 in. |
| Annual | 44.5 °F | 61.8 °F | 79 in. |
| 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 : 15°F to 20°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |