Sylvan Beach, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.7 °F (low) to 57.1 °F (high). Annual precipitation averages 46 Inches. Sylvan Beach is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.9 °F | 30.7 °F | 3.1 in. |
| February | 14.8 °F | 33.0 °F | 2.71 in. |
| March | 23.0 °F | 41.1 °F | 3.11 in. |
| April | 34.6 °F | 55.9 °F | 3.52 in. |
| May | 46.0 °F | 68.8 °F | 4.19 in. |
| June | 55.1 °F | 77.0 °F | 4.56 in. |
| July | 59.8 °F | 81.6 °F | 4.2 in. |
| August | 58.6 °F | 80.0 °F | 4.08 in. |
| September | 51.3 °F | 73.1 °F | 4.34 in. |
| October | 41.1 °F | 60.0 °F | 4.86 in. |
| November | 31.9 °F | 47.8 °F | 3.58 in. |
| December | 22.0 °F | 36.4 °F | 3.7 in. |
| Annual | 37.7 °F | 57.1 °F | 45.95 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |