Mulino, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.9 °C (low) to 17.4 °C (high). Annual precipitation averages 1150.9 Millimeters. Mulino 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 | 2.2 °C | 8.7 °C | 161.54 mm |
| February | 2.4 °C | 10.7 °C | 115.82 mm |
| March | 3.7 °C | 13.3 °C | 132.84 mm |
| April | 5.5 °C | 16 °C | 102.11 mm |
| May | 8.4 °C | 19.9 °C | 74.42 mm |
| June | 10.8 °C | 22.9 °C | 50.04 mm |
| July | 12.9 °C | 27.5 °C | 12.95 mm |
| August | 12.9 °C | 27.8 °C | 12.7 mm |
| September | 10.7 °C | 24.6 °C | 44.2 mm |
| October | 7.3 °C | 17.8 °C | 103.38 mm |
| November | 4.3 °C | 11.7 °C | 163.07 mm |
| December | 1.9 °C | 8.2 °C | 177.8 mm |
| Annual | 6.9 °C | 17.4 °C | 1150.87 mm |
| 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 9a : -6.7°C to -3.9°C |
| Plant Hardiness Zone - 2012 | Zone 8b : -9.4°C to -6.7°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |