Chazy, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.6 °C (low) to 12.7 °C (high). Annual precipitation averages 939.8 Millimeters. Chazy is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.6 °C | -3 °C | 68.33 mm |
| February | -11.7 °C | -1.4 °C | 48.51 mm |
| March | -6.2 °C | 3.7 °C | 54.36 mm |
| April | 1.3 °C | 12.1 °C | 75.44 mm |
| May | 8.1 °C | 19.7 °C | 82.3 mm |
| June | 13.4 °C | 24.3 °C | 106.93 mm |
| July | 16.3 °C | 26.8 °C | 93.47 mm |
| August | 15.1 °C | 26.1 °C | 97.28 mm |
| September | 11 °C | 21.9 °C | 81.28 mm |
| October | 4.7 °C | 14.4 °C | 94.49 mm |
| November | -1.1 °C | 7.2 °C | 64.01 mm |
| December | -7.6 °C | 0.8 °C | 73.41 mm |
| Annual | 2.6 °C | 12.7 °C | 939.81 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 |