Stamford, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 0.8 °C (low) to 13 °C (high). Annual precipitation averages 1145.3 Millimeters. Stamford is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 21 - May 31 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -11.4 °C | -0.7 °C | 74.93 mm |
| February | -10.6 °C | 0.5 °C | 62.23 mm |
| March | -6.8 °C | 5.1 °C | 87.88 mm |
| April | -0.8 °C | 12.5 °C | 99.06 mm |
| May | 4.7 °C | 19.2 °C | 102.11 mm |
| June | 10.1 °C | 23.3 °C | 116.08 mm |
| July | 12.4 °C | 25.5 °C | 114.81 mm |
| August | 11.7 °C | 24.8 °C | 110.24 mm |
| September | 7.9 °C | 21.3 °C | 99.82 mm |
| October | 2.2 °C | 14.6 °C | 109.22 mm |
| November | -2.6 °C | 7.5 °C | 87.63 mm |
| December | -7.1 °C | 2 °C | 81.28 mm |
| Annual | 0.8 °C | 13 °C | 1145.29 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 21 - May 31 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |