Lowell, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 5.9 °C (low) to 17.1 °C (high). Annual precipitation averages 1172.7 Millimeters. Lowell is located in USDA Plant Hardiness Zone 9a. 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 | 1.5 °C | 8.6 °C | 143 mm |
| February | 1.8 °C | 10.8 °C | 120.14 mm |
| March | 2.9 °C | 13.2 °C | 130.3 mm |
| April | 4.4 °C | 15.4 °C | 118.87 mm |
| May | 7.1 °C | 19.1 °C | 86.61 mm |
| June | 9.3 °C | 22.2 °C | 54.36 mm |
| July | 11.5 °C | 26.9 °C | 14.99 mm |
| August | 11.3 °C | 27.3 °C | 15.24 mm |
| September | 9.4 °C | 24.3 °C | 40.64 mm |
| October | 6.4 °C | 17.9 °C | 96.27 mm |
| November | 3.8 °C | 11.6 °C | 169.67 mm |
| December | 1.5 °C | 7.9 °C | 182.63 mm |
| Annual | 5.9 °C | 17.1 °C | 1172.72 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 11 - Mar. 20 |
| Average Days With Frost | 20-30 Days |
| Plant Hardiness Zone | Zone 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |