Potsdam, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.2 °F (low) to 54.4 °F (high). Annual precipitation averages 44.7 Inches. 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 | 7.9 °F | 26.3 °F | 3.16 in. |
| February | 9.2 °F | 28.6 °F | 2.63 in. |
| March | 19.4 °F | 38.0 °F | 3.01 in. |
| April | 33.3 °F | 53.0 °F | 3.74 in. |
| May | 45.5 °F | 67.3 °F | 3.64 in. |
| June | 55.0 °F | 75.1 °F | 4.44 in. |
| July | 59.7 °F | 79.9 °F | 4.25 in. |
| August | 57.8 °F | 78.5 °F | 3.69 in. |
| September | 49.9 °F | 71.0 °F | 4.23 in. |
| October | 39.1 °F | 57.6 °F | 4.79 in. |
| November | 28.6 °F | 44.8 °F | 3.7 in. |
| December | 16.8 °F | 32.6 °F | 3.4 in. |
| Annual | 35.2 °F | 54.4 °F | 44.68 in. |
| 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 : -25°F to -20°F |
| Plant Hardiness Zone - 2012 | Zone 4b : -25°F to -20°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |