Amsterdam, 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 14.4 °C (high). Annual precipitation averages 1079.8 Millimeters. Amsterdam is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.7 °C | -0.4 °C | 80.01 mm |
| February | -9 °C | 1.1 °C | 63.75 mm |
| March | -4.4 °C | 5.9 °C | 83.57 mm |
| April | 2.2 °C | 14.1 °C | 87.63 mm |
| May | 8.6 °C | 20.9 °C | 88.65 mm |
| June | 13.4 °C | 25.4 °C | 114.81 mm |
| July | 16.4 °C | 27.9 °C | 109.47 mm |
| August | 15.3 °C | 27.1 °C | 99.82 mm |
| September | 11.3 °C | 23.1 °C | 89.41 mm |
| October | 4.9 °C | 16.2 °C | 98.81 mm |
| November | -0.8 °C | 8.7 °C | 82.04 mm |
| December | -5.7 °C | 2.4 °C | 81.79 mm |
| Annual | 3.5 °C | 14.4 °C | 1079.76 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |