Aloha, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 44 °F (low) to 63.2 °F (high). Annual precipitation averages 40.3 Inches. Aloha 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 35.8 °F | 47.2 °F | 5.85 in. |
| February | 35.8 °F | 51.0 °F | 4.26 in. |
| March | 38.3 °F | 55.9 °F | 4.27 in. |
| April | 41.3 °F | 61.2 °F | 3.12 in. |
| May | 46.9 °F | 68.3 °F | 2.35 in. |
| June | 51.0 °F | 73.3 °F | 1.65 in. |
| July | 55.0 °F | 81.2 °F | 0.4 in. |
| August | 55.0 °F | 81.9 °F | 0.5 in. |
| September | 50.6 °F | 76.0 °F | 1.46 in. |
| October | 44.3 °F | 63.8 °F | 3.43 in. |
| November | 39.1 °F | 52.7 °F | 5.95 in. |
| December | 35.3 °F | 46.2 °F | 7.03 in. |
| Annual | 44 °F | 63.2 °F | 40.27 in. |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 30-40 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 |