Castile, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.4 °C (low) to 12.9 °C (high). Annual precipitation averages 996.7 Millimeters. Castile is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.8 °C | -1.1 °C | 65.02 mm |
| February | -9.4 °C | 0.1 °C | 51.31 mm |
| March | -5.7 °C | 4.4 °C | 68.33 mm |
| April | 0.3 °C | 11.9 °C | 81.03 mm |
| May | 6.8 °C | 19.1 °C | 84.33 mm |
| June | 12.1 °C | 23.6 °C | 100.58 mm |
| July | 14.5 °C | 25.8 °C | 103.12 mm |
| August | 13.4 °C | 25.2 °C | 98.3 mm |
| September | 9.7 °C | 21.6 °C | 95 mm |
| October | 4.1 °C | 14.6 °C | 97.79 mm |
| November | -1.3 °C | 7.6 °C | 78.99 mm |
| December | -6.2 °C | 1.8 °C | 72.9 mm |
| Annual | 2.4 °C | 12.9 °C | 996.7 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |