Narrowsburg, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.6 °C (low) to 15.2 °C (high). Annual precipitation averages 1142.3 Millimeters. Narrowsburg 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 | -9.7 °C | 1.1 °C | 79.25 mm |
| February | -9 °C | 2.7 °C | 56.9 mm |
| March | -4.7 °C | 7.4 °C | 84.07 mm |
| April | 0.9 °C | 14.9 °C | 95.5 mm |
| May | 6.8 °C | 21.4 °C | 98.3 mm |
| June | 12.2 °C | 25.7 °C | 122.94 mm |
| July | 14.8 °C | 28.3 °C | 101.35 mm |
| August | 13.8 °C | 27.2 °C | 107.19 mm |
| September | 9.8 °C | 23.4 °C | 113.79 mm |
| October | 3.5 °C | 16.8 °C | 108.46 mm |
| November | -1.7 °C | 9.9 °C | 79.76 mm |
| December | -6.1 °C | 3.6 °C | 94.74 mm |
| Annual | 2.6 °C | 15.2 °C | 1142.25 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |