Chemung, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.9 °C (low) to 14.3 °C (high). Annual precipitation averages 1001.8 Millimeters. Chemung is located in USDA Plant Hardiness Zone 6a. 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 | -9.8 °C | 0.1 °C | 63.25 mm |
| February | -9.5 °C | 1.4 °C | 53.34 mm |
| March | -5.6 °C | 6.1 °C | 75.69 mm |
| April | 0.1 °C | 13.7 °C | 88.39 mm |
| May | 6.2 °C | 20.6 °C | 87.12 mm |
| June | 11.3 °C | 25.1 °C | 108.46 mm |
| July | 13.6 °C | 27.5 °C | 95.25 mm |
| August | 12.9 °C | 26.7 °C | 95 mm |
| September | 9.1 °C | 22.8 °C | 101.85 mm |
| October | 2.9 °C | 15.7 °C | 92.2 mm |
| November | -1.9 °C | 8.7 °C | 73.66 mm |
| December | -6.2 °C | 2.7 °C | 67.56 mm |
| Annual | 1.9 °C | 14.3 °C | 1001.77 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 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 |