North Castle, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 42.7 °F (low) to 61.1 °F (high). Annual precipitation averages 50.5 Inches. North Castle 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 | 21.2 °F | 37.0 °F | 3.92 in. |
| February | 22.7 °F | 39.8 °F | 2.83 in. |
| March | 29.6 °F | 47.7 °F | 4.12 in. |
| April | 39.8 °F | 60.4 °F | 4.0 in. |
| May | 49.4 °F | 70.7 °F | 3.7 in. |
| June | 59.2 °F | 79.0 °F | 4.59 in. |
| July | 64.5 °F | 84.2 °F | 4.33 in. |
| August | 63.3 °F | 82.0 °F | 4.94 in. |
| September | 56.0 °F | 75.0 °F | 4.87 in. |
| October | 44.8 °F | 63.4 °F | 4.74 in. |
| November | 35.1 °F | 52.4 °F | 4.19 in. |
| December | 27.3 °F | 42.0 °F | 4.31 in. |
| Annual | 42.7 °F | 61.1 °F | 50.54 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 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |