Oneonta, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.2 °F (low) to 57.1 °F (high). Annual precipitation averages 44.3 Inches. Oneonta is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.1 °F | 31.4 °F | 3.01 in. |
| February | 14.1 °F | 34.7 °F | 2.33 in. |
| March | 20.6 °F | 42.5 °F | 3.34 in. |
| April | 31.8 °F | 56.4 °F | 3.71 in. |
| May | 43.0 °F | 68.6 °F | 4.06 in. |
| June | 52.1 °F | 76.6 °F | 4.35 in. |
| July | 56.8 °F | 80.8 °F | 4.17 in. |
| August | 55.5 °F | 79.2 °F | 4.96 in. |
| September | 48.2 °F | 72.2 °F | 3.54 in. |
| October | 38.1 °F | 59.8 °F | 3.99 in. |
| November | 28.4 °F | 47.0 °F | 3.44 in. |
| December | 20.8 °F | 36.4 °F | 3.42 in. |
| Annual | 35.2 °F | 57.1 °F | 44.32 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |