Mamaroneck, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 8 °C (low) to 16.6 °C (high). Annual precipitation averages 1224.3 Millimeters. Mamaroneck 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 | -3.6 °C | 4.1 °C | 94.49 mm |
| February | -3.1 °C | 5.2 °C | 72.14 mm |
| March | 0.4 °C | 8.8 °C | 104.14 mm |
| April | 5.8 °C | 15.2 °C | 97.79 mm |
| May | 11.3 °C | 21 °C | 93.73 mm |
| June | 16.6 °C | 25.8 °C | 117.35 mm |
| July | 19.9 °C | 28.7 °C | 103.89 mm |
| August | 19.4 °C | 27.9 °C | 113.28 mm |
| September | 15.8 °C | 24.7 °C | 115.06 mm |
| October | 9.7 °C | 18.3 °C | 106.68 mm |
| November | 4.3 °C | 12.3 °C | 95.25 mm |
| December | -0.1 °C | 7.1 °C | 110.49 mm |
| Annual | 8 °C | 16.6 °C | 1224.29 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |