Greene, Maine has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.2 °C (low) to 12.8 °C (high). Annual precipitation averages 1220 Millimeters. Greene is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.8 °C | -1.7 °C | 86.87 mm |
| February | -10.9 °C | -0.1 °C | 81.79 mm |
| March | -5.6 °C | 4.6 °C | 95 mm |
| April | 0.7 °C | 11.6 °C | 109.98 mm |
| May | 6.7 °C | 18.3 °C | 92.2 mm |
| June | 12.1 °C | 23.2 °C | 119.38 mm |
| July | 15.3 °C | 26.4 °C | 95.25 mm |
| August | 14.5 °C | 25.9 °C | 89.41 mm |
| September | 10.2 °C | 21.7 °C | 97.28 mm |
| October | 4 °C | 14.4 °C | 133.86 mm |
| November | -1.5 °C | 7.7 °C | 107.95 mm |
| December | -7.3 °C | 1.7 °C | 111 mm |
| Annual | 2.2 °C | 12.8 °C | 1219.97 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |