Green, Oregon has a Warm-Summer Mediterranean Climate climate (Köppen classification: Csb). Average annual temperatures range from 43.6 °F (low) to 66.9 °F (high). Annual precipitation averages 34.9 Inches. 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 | 35.7 °F | 49.6 °F | 5.19 in. |
| February | 36.1 °F | 53.7 °F | 3.91 in. |
| March | 37.8 °F | 58.5 °F | 3.98 in. |
| April | 40.7 °F | 63.9 °F | 2.95 in. |
| May | 45.7 °F | 71.7 °F | 2.2 in. |
| June | 50.5 °F | 78.2 °F | 1.05 in. |
| July | 54.7 °F | 86.8 °F | 0.3 in. |
| August | 54.1 °F | 87.4 °F | 0.32 in. |
| September | 49.4 °F | 81.9 °F | 0.89 in. |
| October | 43.5 °F | 68.1 °F | 2.44 in. |
| November | 39.7 °F | 54.8 °F | 5.15 in. |
| December | 35.7 °F | 47.9 °F | 6.53 in. |
| Annual | 43.6 °F | 66.9 °F | 34.91 in. |
| 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 : 20°F to 25°F |
| Plant Hardiness Zone - 2012 | Zone 8b : 15°F to 20°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Csb - Warm-Summer Mediterranean Climate |