Round Top, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 37.9 °F (low) to 59.1 °F (high). Annual precipitation averages 44.2 Inches. Round Top 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 | 15.4 °F | 33.5 °F | 3.12 in. |
| February | 16.9 °F | 36.5 °F | 2.56 in. |
| March | 24.6 °F | 44.7 °F | 3.46 in. |
| April | 35.4 °F | 58.9 °F | 3.6 in. |
| May | 45.9 °F | 70.4 °F | 3.46 in. |
| June | 55.0 °F | 78.5 °F | 4.24 in. |
| July | 59.9 °F | 83.0 °F | 3.65 in. |
| August | 58.2 °F | 81.1 °F | 3.97 in. |
| September | 50.8 °F | 74.0 °F | 4.09 in. |
| October | 40.0 °F | 61.5 °F | 4.94 in. |
| November | 30.5 °F | 49.1 °F | 3.31 in. |
| December | 22.2 °F | 38.4 °F | 3.76 in. |
| Annual | 37.9 °F | 59.1 °F | 44.16 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |