Watervliet, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.5 °F (low) to 59.3 °F (high). Annual precipitation averages 41.6 Inches. Watervliet 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 | 17.0 °F | 33.0 °F | 2.77 in. |
| February | 18.2 °F | 36.0 °F | 2.13 in. |
| March | 26.6 °F | 44.9 °F | 2.83 in. |
| April | 38.0 °F | 58.9 °F | 3.07 in. |
| May | 49.4 °F | 70.5 °F | 3.55 in. |
| June | 58.6 °F | 78.9 °F | 4.54 in. |
| July | 63.1 °F | 83.7 °F | 4.65 in. |
| August | 61.9 °F | 81.7 °F | 4.09 in. |
| September | 53.9 °F | 74.5 °F | 3.85 in. |
| October | 42.7 °F | 61.6 °F | 4.06 in. |
| November | 32.9 °F | 49.2 °F | 2.8 in. |
| December | 24.1 °F | 38.4 °F | 3.27 in. |
| Annual | 40.5 °F | 59.3 °F | 41.61 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |