Swan Lake, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 36.3 °F (low) to 56.2 °F (high). Annual precipitation averages 49.9 Inches. Swan Lake is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.8 °F | 31.0 °F | 3.52 in. |
| February | 14.9 °F | 33.9 °F | 2.62 in. |
| March | 22.9 °F | 42.5 °F | 3.56 in. |
| April | 33.7 °F | 55.4 °F | 4.02 in. |
| May | 44.3 °F | 66.7 °F | 4.32 in. |
| June | 53.5 °F | 74.9 °F | 5.29 in. |
| July | 58.0 °F | 79.8 °F | 4.95 in. |
| August | 56.6 °F | 77.8 °F | 4.6 in. |
| September | 49.5 °F | 71.0 °F | 4.75 in. |
| October | 38.4 °F | 59.0 °F | 4.61 in. |
| November | 29.0 °F | 46.9 °F | 3.46 in. |
| December | 20.7 °F | 35.9 °F | 4.16 in. |
| Annual | 36.3 °F | 56.2 °F | 49.86 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |