Trumansburg, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.4 °C (low) to 14 °C (high). Annual precipitation averages 947.7 Millimeters. Trumansburg is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.9 °C | -0.2 °C | 55.37 mm |
| February | -8.3 °C | 1.2 °C | 47.24 mm |
| March | -4.6 °C | 5.6 °C | 68.33 mm |
| April | 1.6 °C | 13.2 °C | 81.79 mm |
| May | 7.8 °C | 20.2 °C | 79.25 mm |
| June | 12.8 °C | 24.6 °C | 99.06 mm |
| July | 15.4 °C | 27.1 °C | 101.09 mm |
| August | 14.6 °C | 26.4 °C | 91.95 mm |
| September | 10.7 °C | 22.6 °C | 96.77 mm |
| October | 5.1 °C | 15.5 °C | 91.44 mm |
| November | -0.1 °C | 8.7 °C | 70.61 mm |
| December | -4.8 °C | 2.8 °C | 64.77 mm |
| Annual | 3.4 °C | 14 °C | 947.67 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |