Ossining, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 42.9 °F (low) to 62 °F (high). Annual precipitation averages 49 Inches. Ossining is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.3 °F | 37.8 °F | 3.66 in. |
| February | 23.0 °F | 40.7 °F | 2.66 in. |
| March | 30.0 °F | 48.5 °F | 4.01 in. |
| April | 40.2 °F | 61.2 °F | 3.87 in. |
| May | 49.9 °F | 71.5 °F | 3.54 in. |
| June | 59.3 °F | 80.1 °F | 4.42 in. |
| July | 64.7 °F | 84.8 °F | 4.55 in. |
| August | 63.2 °F | 83.0 °F | 4.91 in. |
| September | 56.0 °F | 76.3 °F | 4.69 in. |
| October | 44.6 °F | 64.3 °F | 4.57 in. |
| November | 34.8 °F | 53.3 °F | 4.05 in. |
| December | 27.4 °F | 42.5 °F | 4.07 in. |
| Annual | 42.9 °F | 62 °F | 49 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |