Potsdam, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.8 °C (low) to 12.4 °C (high). Annual precipitation averages 1134.9 Millimeters. Potsdam is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -13.4 °C | -3.2 °C | 80.26 mm |
| February | -12.7 °C | -1.9 °C | 66.8 mm |
| March | -7 °C | 3.3 °C | 76.45 mm |
| April | 0.7 °C | 11.7 °C | 95 mm |
| May | 7.5 °C | 19.6 °C | 92.46 mm |
| June | 12.8 °C | 23.9 °C | 112.78 mm |
| July | 15.4 °C | 26.6 °C | 107.95 mm |
| August | 14.3 °C | 25.8 °C | 93.73 mm |
| September | 9.9 °C | 21.7 °C | 107.44 mm |
| October | 3.9 °C | 14.2 °C | 121.67 mm |
| November | -1.9 °C | 7.1 °C | 93.98 mm |
| December | -8.4 °C | 0.3 °C | 86.36 mm |
| Annual | 1.8 °C | 12.4 °C | 1134.88 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |