Heuvelton, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.8 °F (low) to 54.4 °F (high). Annual precipitation averages 38.7 Inches. Heuvelton is located in USDA Plant Hardiness Zone 5a. 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 | 8.7 °F | 26.2 °F | 2.9 in. |
| February | 9.8 °F | 28.8 °F | 2.35 in. |
| March | 20.3 °F | 37.8 °F | 2.52 in. |
| April | 34.0 °F | 52.9 °F | 3.23 in. |
| May | 45.9 °F | 66.6 °F | 3.24 in. |
| June | 55.4 °F | 75.2 °F | 3.63 in. |
| July | 60.2 °F | 80.0 °F | 3.65 in. |
| August | 58.2 °F | 78.7 °F | 3.35 in. |
| September | 50.2 °F | 71.4 °F | 3.55 in. |
| October | 39.6 °F | 57.7 °F | 3.94 in. |
| November | 29.3 °F | 45.0 °F | 3.16 in. |
| December | 17.6 °F | 32.7 °F | 3.13 in. |
| Annual | 35.8 °F | 54.4 °F | 38.65 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 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |