Larchmont, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 8.6 °C (low) to 16.6 °C (high). Annual precipitation averages 1223.3 Millimeters. Larchmont 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. 11 - Nov. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -3.2 °C | 4.1 °C | 93.98 mm |
| February | -2.6 °C | 5.1 °C | 72.39 mm |
| March | 0.9 °C | 8.8 °C | 104.39 mm |
| April | 6.4 °C | 15.2 °C | 98.3 mm |
| May | 11.6 °C | 20.9 °C | 95 mm |
| June | 17.2 °C | 25.8 °C | 116.84 mm |
| July | 20.5 °C | 28.7 °C | 104.9 mm |
| August | 20.1 °C | 28 °C | 113.54 mm |
| September | 16.3 °C | 24.7 °C | 113.03 mm |
| October | 10.3 °C | 18.4 °C | 106.68 mm |
| November | 4.8 °C | 12.3 °C | 93.98 mm |
| December | 0.4 °C | 7.1 °C | 110.24 mm |
| Annual | 8.6 °C | 16.6 °C | 1223.27 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |