Port Washington, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 8.2 °C (low) to 16.9 °C (high). Annual precipitation averages 1224 Millimeters. Port Washington 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 | 4.3 °C | 93.98 mm |
| February | -2.7 °C | 5.6 °C | 74.68 mm |
| March | 0.7 °C | 9.4 °C | 108.71 mm |
| April | 5.9 °C | 15.6 °C | 102.11 mm |
| May | 11.2 °C | 21.1 °C | 99.57 mm |
| June | 16.7 °C | 26.1 °C | 111 mm |
| July | 19.9 °C | 29.1 °C | 105.41 mm |
| August | 19.4 °C | 28.2 °C | 112.78 mm |
| September | 15.7 °C | 24.8 °C | 104.9 mm |
| October | 9.7 °C | 18.6 °C | 112.27 mm |
| November | 4.4 °C | 12.6 °C | 88.65 mm |
| December | 0.1 °C | 7.3 °C | 109.98 mm |
| Annual | 8.2 °C | 16.9 °C | 1224.04 mm |
| Average First Frost Date | Nov. 11 - Nov. 20 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| Average Days With Frost | 50-75 Days |
| Plant Hardiness Zone | Zone 7b : -15°C to -12.2°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |