Stafford, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.5 °C (low) to 13.9 °C (high). Annual precipitation averages 914.2 Millimeters. Stafford is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.9 °C | -0.2 °C | 61.21 mm |
| February | -8.4 °C | 0.8 °C | 45.72 mm |
| March | -4.6 °C | 5.4 °C | 63.5 mm |
| April | 1.4 °C | 12.9 °C | 75.95 mm |
| May | 8 °C | 20 °C | 80.01 mm |
| June | 13.2 °C | 24.7 °C | 91.44 mm |
| July | 15.6 °C | 26.8 °C | 93.73 mm |
| August | 14.8 °C | 26.2 °C | 87.12 mm |
| September | 10.9 °C | 22.5 °C | 87.38 mm |
| October | 5.2 °C | 15.6 °C | 91.19 mm |
| November | -0.2 °C | 8.7 °C | 70.1 mm |
| December | -4.9 °C | 2.8 °C | 66.8 mm |
| Annual | 3.5 °C | 13.9 °C | 914.15 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |