Jefferson Heights, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.6 °C (low) to 16 °C (high). Annual precipitation averages 1133.6 Millimeters. Jefferson Heights 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 | -8.2 °C | 1.6 °C | 81.28 mm |
| February | -7.2 °C | 3.2 °C | 63.5 mm |
| March | -2.8 °C | 8.2 °C | 84.07 mm |
| April | 3.3 °C | 16.2 °C | 92.2 mm |
| May | 9.1 °C | 22.4 °C | 84.84 mm |
| June | 14.3 °C | 26.8 °C | 111.76 mm |
| July | 16.9 °C | 29.3 °C | 102.62 mm |
| August | 16.2 °C | 28.1 °C | 119.63 mm |
| September | 11.8 °C | 24.1 °C | 108.71 mm |
| October | 5.6 °C | 17.2 °C | 109.73 mm |
| November | 0.3 °C | 10.4 °C | 82.3 mm |
| December | -4.3 °C | 4.2 °C | 92.96 mm |
| Annual | 4.6 °C | 16 °C | 1133.6 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |