Stockton, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.1 °C (low) to 13.5 °C (high). Annual precipitation averages 1242.3 Millimeters. Stockton 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.8 °C | -0.4 °C | 99.31 mm |
| February | -8.7 °C | 0.7 °C | 69.09 mm |
| March | -5 °C | 5.6 °C | 85.34 mm |
| April | 1 °C | 12.9 °C | 100.58 mm |
| May | 7.2 °C | 19.5 °C | 102.62 mm |
| June | 12.4 °C | 24 °C | 103.63 mm |
| July | 14.6 °C | 26.2 °C | 122.43 mm |
| August | 14.1 °C | 25.4 °C | 99.31 mm |
| September | 10.4 °C | 22.1 °C | 115.82 mm |
| October | 4.7 °C | 15.2 °C | 125.48 mm |
| November | -0.3 °C | 8.4 °C | 105.92 mm |
| December | -4.7 °C | 2.5 °C | 112.78 mm |
| Annual | 3.1 °C | 13.5 °C | 1242.31 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 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 |