Hampton Bays, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 6.8 °C (low) to 15.7 °C (high). Annual precipitation averages 1178.6 Millimeters. Hampton Bays is located in USDA Plant Hardiness Zone 7a. 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 | -4.4 °C | 3.9 °C | 95.5 mm |
| February | -3.9 °C | 4.7 °C | 85.85 mm |
| March | -0.7 °C | 8.1 °C | 118.62 mm |
| April | 4 °C | 13.7 °C | 104.39 mm |
| May | 9.2 °C | 19 °C | 86.61 mm |
| June | 14.7 °C | 24.2 °C | 93.98 mm |
| July | 18.4 °C | 27.4 °C | 74.42 mm |
| August | 18.1 °C | 27 °C | 96.27 mm |
| September | 14.6 °C | 23.7 °C | 99.57 mm |
| October | 9 °C | 17.7 °C | 114.81 mm |
| November | 3.7 °C | 12.2 °C | 94.74 mm |
| December | -0.9 °C | 7 °C | 113.79 mm |
| Annual | 6.8 °C | 15.7 °C | 1178.55 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |