Elma, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.7 °C (low) to 13.7 °C (high). Annual precipitation averages 1097.8 Millimeters. Elma is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.3 °C | 0.1 °C | 85.6 mm |
| February | -8.1 °C | 0.8 °C | 64.01 mm |
| March | -4.4 °C | 5.5 °C | 81.53 mm |
| April | 1.6 °C | 12.8 °C | 87.63 mm |
| May | 7.8 °C | 19.4 °C | 85.09 mm |
| June | 13.1 °C | 24.1 °C | 104.14 mm |
| July | 15.7 °C | 26.4 °C | 91.95 mm |
| August | 14.9 °C | 26.1 °C | 90.68 mm |
| September | 11 °C | 22.4 °C | 105.41 mm |
| October | 5.2 °C | 15.5 °C | 110.74 mm |
| November | 0.1 °C | 8.8 °C | 99.57 mm |
| December | -4.7 °C | 2.9 °C | 91.44 mm |
| Annual | 3.7 °C | 13.7 °C | 1097.79 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |