Deer Park, New York has a Humid Subtropical Climate climate (Köppen classification: Cfa). Average annual temperatures range from 7.6 °C (low) to 16.5 °C (high). Annual precipitation averages 1202.2 Millimeters. Deer Park is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.8 °C | 4.2 °C | 96.77 mm |
| February | -3.2 °C | 5.4 °C | 82.3 mm |
| March | 0.2 °C | 9.2 °C | 116.08 mm |
| April | 5.3 °C | 15.4 °C | 106.43 mm |
| May | 10.6 °C | 20.8 °C | 87.88 mm |
| June | 16.1 °C | 25.7 °C | 100.33 mm |
| July | 19.5 °C | 28.7 °C | 82.55 mm |
| August | 18.9 °C | 27.8 °C | 104.65 mm |
| September | 15.2 °C | 24.1 °C | 97.54 mm |
| October | 8.9 °C | 17.8 °C | 119.38 mm |
| November | 3.5 °C | 12.2 °C | 90.68 mm |
| December | -0.6 °C | 7.2 °C | 117.6 mm |
| Annual | 7.6 °C | 16.5 °C | 1202.19 mm |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Cfa - Humid Subtropical Climate |