Green, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 6.5 °C (low) to 19.4 °C (high). Annual precipitation averages 886.7 Millimeters. Green is located in USDA Plant Hardiness Zone 9a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 2.1 °C | 9.8 °C | 131.83 mm |
| February | 2.3 °C | 12.1 °C | 99.31 mm |
| March | 3.2 °C | 14.7 °C | 101.09 mm |
| April | 4.8 °C | 17.7 °C | 74.93 mm |
| May | 7.6 °C | 22.1 °C | 55.88 mm |
| June | 10.3 °C | 25.7 °C | 26.67 mm |
| July | 12.6 °C | 30.4 °C | 7.62 mm |
| August | 12.3 °C | 30.8 °C | 8.13 mm |
| September | 9.7 °C | 27.7 °C | 22.61 mm |
| October | 6.4 °C | 20.1 °C | 61.98 mm |
| November | 4.3 °C | 12.7 °C | 130.81 mm |
| December | 2.1 °C | 8.8 °C | 165.86 mm |
| Annual | 6.5 °C | 19.4 °C | 886.72 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| 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 | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |