Retsof, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.8 °F (low) to 57.6 °F (high). Annual precipitation averages 34.4 Inches. Retsof is located in USDA Plant Hardiness Zone 6a. 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 | 16.8 °F | 32.5 °F | 2.17 in. |
| February | 17.3 °F | 34.2 °F | 1.71 in. |
| March | 24.4 °F | 42.4 °F | 2.29 in. |
| April | 35.1 °F | 55.8 °F | 2.84 in. |
| May | 46.7 °F | 68.7 °F | 3.0 in. |
| June | 56.1 °F | 77.0 °F | 3.5 in. |
| July | 60.6 °F | 81.1 °F | 3.89 in. |
| August | 59.0 °F | 79.5 °F | 3.39 in. |
| September | 51.9 °F | 73.2 °F | 3.14 in. |
| October | 41.7 °F | 60.6 °F | 3.38 in. |
| November | 32.2 °F | 48.2 °F | 2.66 in. |
| December | 23.7 °F | 37.7 °F | 2.39 in. |
| Annual | 38.8 °F | 57.6 °F | 34.36 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |