Durham, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.3 °C (low) to 14.4 °C (high). Annual precipitation averages 1093.2 Millimeters. Durham is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.1 °C | 0.5 °C | 70.61 mm |
| February | -9.4 °C | 2.1 °C | 61.98 mm |
| March | -5.4 °C | 6.2 °C | 85.09 mm |
| April | 0.8 °C | 14 °C | 86.87 mm |
| May | 6.7 °C | 20.5 °C | 91.95 mm |
| June | 11.7 °C | 24.9 °C | 114.81 mm |
| July | 14.3 °C | 27.3 °C | 95 mm |
| August | 13.4 °C | 26.3 °C | 97.28 mm |
| September | 9.6 °C | 22.6 °C | 98.81 mm |
| October | 3.7 °C | 15.7 °C | 128.78 mm |
| November | -1.5 °C | 9.1 °C | 76.71 mm |
| December | -5.9 °C | 3.2 °C | 85.34 mm |
| Annual | 2.3 °C | 14.4 °C | 1093.23 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |