Columbia City, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 43.7 °F (low) to 63.1 °F (high). Annual precipitation averages 45.4 Inches. Columbia City is located in USDA Plant Hardiness Zone 8b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.1 °F | 46.6 °F | 6.34 in. |
| February | 35.0 °F | 50.6 °F | 4.74 in. |
| March | 37.9 °F | 55.6 °F | 4.83 in. |
| April | 40.9 °F | 61.3 °F | 3.8 in. |
| May | 46.6 °F | 68.5 °F | 2.75 in. |
| June | 50.7 °F | 73.3 °F | 1.84 in. |
| July | 55.1 °F | 81.2 °F | 0.39 in. |
| August | 55.0 °F | 82.3 °F | 0.77 in. |
| September | 50.4 °F | 76.2 °F | 1.82 in. |
| October | 43.9 °F | 63.7 °F | 3.92 in. |
| November | 38.7 °F | 52.5 °F | 6.67 in. |
| December | 34.9 °F | 45.8 °F | 7.51 in. |
| Annual | 43.7 °F | 63.1 °F | 45.38 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Normal |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |