Sayville, New York has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 45.4 °F (low) to 60.7 °F (high). Annual precipitation averages 49.9 Inches. Sayville is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 24.9 °F | 39.2 °F | 3.89 in. |
| February | 25.9 °F | 40.8 °F | 3.55 in. |
| March | 32.0 °F | 47.3 °F | 5.03 in. |
| April | 41.3 °F | 57.5 °F | 4.28 in. |
| May | 50.8 °F | 66.9 °F | 3.86 in. |
| June | 60.7 °F | 76.5 °F | 4.31 in. |
| July | 66.9 °F | 82.1 °F | 3.36 in. |
| August | 65.3 °F | 82.0 °F | 4.11 in. |
| September | 59.2 °F | 74.2 °F | 3.9 in. |
| October | 48.3 °F | 63.4 °F | 4.82 in. |
| November | 38.6 °F | 53.7 °F | 3.81 in. |
| December | 30.7 °F | 44.6 °F | 4.93 in. |
| Annual | 45.4 °F | 60.7 °F | 49.85 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |