Hartsdale, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.9 °C (low) to 16.6 °C (high). Annual precipitation averages 1247.4 Millimeters. Hartsdale is located in USDA Plant Hardiness Zone 7a. 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 | -5 °C | 3.5 °C | 94.74 mm |
| February | -4.3 °C | 4.9 °C | 72.64 mm |
| March | -0.4 °C | 9.1 °C | 104.39 mm |
| April | 5.2 °C | 15.9 °C | 97.54 mm |
| May | 10.6 °C | 21.5 °C | 95 mm |
| June | 15.8 °C | 26.4 °C | 119.89 mm |
| July | 18.9 °C | 29.2 °C | 106.93 mm |
| August | 18.2 °C | 28.1 °C | 117.6 mm |
| September | 14.3 °C | 24.4 °C | 120.9 mm |
| October | 8 °C | 18 °C | 109.22 mm |
| November | 2.7 °C | 12 °C | 97.28 mm |
| December | -1.4 °C | 6.4 °C | 111.25 mm |
| Annual | 6.9 °C | 16.6 °C | 1247.38 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |