Poestenkill, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38 °F (low) to 57.9 °F (high). Annual precipitation averages 44.4 Inches. Poestenkill 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 | 14.6 °F | 31.7 °F | 3.1 in. |
| February | 15.8 °F | 34.5 °F | 2.4 in. |
| March | 24.2 °F | 43.1 °F | 3.08 in. |
| April | 35.4 °F | 57.5 °F | 3.45 in. |
| May | 46.7 °F | 69.3 °F | 3.67 in. |
| June | 56.0 °F | 77.4 °F | 4.72 in. |
| July | 60.2 °F | 82.3 °F | 4.59 in. |
| August | 59.1 °F | 80.2 °F | 4.33 in. |
| September | 51.2 °F | 73.2 °F | 4.05 in. |
| October | 40.3 °F | 60.5 °F | 4.39 in. |
| November | 30.7 °F | 48.2 °F | 3.15 in. |
| December | 21.7 °F | 37.0 °F | 3.49 in. |
| Annual | 38 °F | 57.9 °F | 44.42 in. |
| 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 : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |