Nelsonville, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.1 °C (low) to 16.4 °C (high). Annual precipitation averages 1293.1 Millimeters. Nelsonville is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.6 °C | 2.4 °C | 98.3 mm |
| February | -6.5 °C | 4.1 °C | 72.9 mm |
| March | -2.2 °C | 8.8 °C | 103.38 mm |
| April | 3.9 °C | 15.8 °C | 100.08 mm |
| May | 9.5 °C | 21.9 °C | 93.47 mm |
| June | 14.7 °C | 26.8 °C | 116.33 mm |
| July | 17.6 °C | 29.7 °C | 112.01 mm |
| August | 16.8 °C | 28.7 °C | 123.19 mm |
| September | 12.6 °C | 24.7 °C | 125.98 mm |
| October | 6.1 °C | 17.8 °C | 130.3 mm |
| November | 0.6 °C | 11.2 °C | 106.68 mm |
| December | -4.1 °C | 5.1 °C | 110.49 mm |
| Annual | 5.1 °C | 16.4 °C | 1293.11 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |