Greigsville, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 38.7 °F (low) to 57.5 °F (high). Annual precipitation averages 34.9 Inches. Greigsville 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 | 16.6 °F | 32.4 °F | 2.18 in. |
| February | 17.1 °F | 34.1 °F | 1.72 in. |
| March | 24.3 °F | 42.2 °F | 2.31 in. |
| April | 35.0 °F | 55.7 °F | 2.88 in. |
| May | 46.6 °F | 68.6 °F | 3.09 in. |
| June | 56.0 °F | 76.9 °F | 3.59 in. |
| July | 60.5 °F | 80.9 °F | 3.97 in. |
| August | 58.9 °F | 79.4 °F | 3.47 in. |
| September | 51.8 °F | 73.0 °F | 3.19 in. |
| October | 41.6 °F | 60.5 °F | 3.43 in. |
| November | 32.1 °F | 48.1 °F | 2.69 in. |
| December | 23.6 °F | 37.6 °F | 2.4 in. |
| Annual | 38.7 °F | 57.5 °F | 34.92 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 |