Town Line, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.9 °C (low) to 13.8 °C (high). Annual precipitation averages 1081.5 Millimeters. Town Line 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 | -8.2 °C | 0.2 °C | 85.34 mm |
| February | -7.9 °C | 0.9 °C | 63.75 mm |
| March | -4.1 °C | 5.6 °C | 81.53 mm |
| April | 1.8 °C | 12.8 °C | 87.38 mm |
| May | 8.1 °C | 19.6 °C | 84.07 mm |
| June | 13.4 °C | 24.1 °C | 101.6 mm |
| July | 15.9 °C | 26.4 °C | 89.92 mm |
| August | 15.2 °C | 26.1 °C | 88.9 mm |
| September | 11.3 °C | 22.5 °C | 104.9 mm |
| October | 5.4 °C | 15.5 °C | 107.44 mm |
| November | 0.2 °C | 8.8 °C | 98.55 mm |
| December | -4.4 °C | 3 °C | 88.14 mm |
| Annual | 3.9 °C | 13.8 °C | 1081.52 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 |