Montezuma, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.8 °C (low) to 14 °C (high). Annual precipitation averages 963.7 Millimeters. Montezuma is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.7 °C | -0.3 °C | 66.29 mm |
| February | -8.3 °C | 0.8 °C | 53.09 mm |
| March | -4.4 °C | 5.2 °C | 66.55 mm |
| April | 1.8 °C | 13.1 °C | 77.47 mm |
| May | 8.2 °C | 20.3 °C | 83.06 mm |
| June | 13.2 °C | 24.9 °C | 92.96 mm |
| July | 15.8 °C | 27.4 °C | 96.77 mm |
| August | 15.1 °C | 27 °C | 92.71 mm |
| September | 11.7 °C | 22.9 °C | 90.42 mm |
| October | 5.8 °C | 15.4 °C | 92.96 mm |
| November | 0.4 °C | 8.9 °C | 77.72 mm |
| December | -4.7 °C | 2.7 °C | 73.66 mm |
| Annual | 3.8 °C | 14 °C | 963.66 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°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 |