Antwerp, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.2 °C (low) to 12.6 °C (high). Annual precipitation averages 1043.9 Millimeters. Antwerp 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 | -12.6 °C | -2.3 °C | 80.52 mm |
| February | -12 °C | -1.3 °C | 60.2 mm |
| March | -6.4 °C | 3.6 °C | 68.33 mm |
| April | 0.8 °C | 11.7 °C | 82.55 mm |
| May | 7.5 °C | 19 °C | 86.61 mm |
| June | 12.8 °C | 23.8 °C | 97.28 mm |
| July | 15.9 °C | 26.1 °C | 88.65 mm |
| August | 15 °C | 25.7 °C | 89.15 mm |
| September | 10.4 °C | 21.8 °C | 93.47 mm |
| October | 4.1 °C | 14.6 °C | 118.36 mm |
| November | -1.6 °C | 7.6 °C | 91.95 mm |
| December | -7.4 °C | 0.9 °C | 86.87 mm |
| Annual | 2.2 °C | 12.6 °C | 1043.94 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 |