Green Island, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 15.2 °C (high). Annual precipitation averages 1059.9 Millimeters. Green Island is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.3 °C | 0.6 °C | 70.36 mm |
| February | -7.6 °C | 2.2 °C | 54.1 mm |
| March | -2.9 °C | 7.2 °C | 71.88 mm |
| April | 3.3 °C | 14.9 °C | 77.98 mm |
| May | 9.7 °C | 21.4 °C | 90.93 mm |
| June | 14.8 °C | 26.1 °C | 115.82 mm |
| July | 17.1 °C | 28.8 °C | 118.11 mm |
| August | 16.6 °C | 27.7 °C | 104.65 mm |
| September | 12.2 °C | 23.7 °C | 98.04 mm |
| October | 6 °C | 16.5 °C | 103.63 mm |
| November | 0.5 °C | 9.6 °C | 71.37 mm |
| December | -4.4 °C | 3.6 °C | 83.06 mm |
| Annual | 4.8 °C | 15.2 °C | 1059.93 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |