Geneseo, 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 57.7 °F (high). Annual precipitation averages 34.1 Inches. Geneseo 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 | 16.7 °F | 32.6 °F | 2.06 in. |
| February | 17.2 °F | 34.4 °F | 1.66 in. |
| March | 24.2 °F | 42.6 °F | 2.34 in. |
| April | 35.1 °F | 56.0 °F | 2.83 in. |
| May | 46.6 °F | 68.7 °F | 3.01 in. |
| June | 55.9 °F | 77.0 °F | 3.54 in. |
| July | 60.4 °F | 81.1 °F | 3.95 in. |
| August | 58.7 °F | 79.6 °F | 3.39 in. |
| September | 51.7 °F | 73.2 °F | 3.14 in. |
| October | 41.5 °F | 60.7 °F | 3.32 in. |
| November | 32.1 °F | 48.4 °F | 2.58 in. |
| December | 23.7 °F | 37.9 °F | 2.29 in. |
| Annual | 38.7 °F | 57.7 °F | 34.11 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 |