Elmsford, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.6 °C (low) to 16.7 °C (high). Annual precipitation averages 1253 Millimeters. Elmsford 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 | -5.3 °C | 3.4 °C | 94.74 mm |
| February | -4.5 °C | 4.9 °C | 69.85 mm |
| March | -0.7 °C | 9.2 °C | 104.14 mm |
| April | 4.9 °C | 16.1 °C | 97.03 mm |
| May | 10.3 °C | 21.7 °C | 94.49 mm |
| June | 15.6 °C | 26.7 °C | 116.08 mm |
| July | 18.7 °C | 29.3 °C | 109.47 mm |
| August | 17.9 °C | 28.3 °C | 123.44 mm |
| September | 13.9 °C | 24.6 °C | 120.4 mm |
| October | 7.6 °C | 18.1 °C | 115.32 mm |
| November | 2.2 °C | 12.1 °C | 100.33 mm |
| December | -1.6 °C | 6.2 °C | 107.7 mm |
| Annual | 6.6 °C | 16.7 °C | 1252.99 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 |