Dover Plains, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.7 °C (low) to 15.8 °C (high). Annual precipitation averages 1209.3 Millimeters. Dover Plains is located in USDA Plant Hardiness Zone 6a. 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 | -8.8 °C | 1.8 °C | 84.33 mm |
| February | -7.8 °C | 3.5 °C | 68.33 mm |
| March | -3.5 °C | 8.1 °C | 91.95 mm |
| April | 2.3 °C | 15.4 °C | 91.44 mm |
| May | 8.2 °C | 21.6 °C | 93.98 mm |
| June | 13.1 °C | 26.1 °C | 114.05 mm |
| July | 16.1 °C | 28.9 °C | 119.38 mm |
| August | 15.2 °C | 27.9 °C | 117.09 mm |
| September | 11 °C | 23.8 °C | 115.06 mm |
| October | 4.7 °C | 17.1 °C | 120.9 mm |
| November | -0.8 °C | 10.6 °C | 90.17 mm |
| December | -5.3 °C | 4.4 °C | 102.62 mm |
| Annual | 3.7 °C | 15.8 °C | 1209.3 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |