Lebanon, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 35.5 °F (low) to 55.6 °F (high). Annual precipitation averages 46.4 Inches. Lebanon is located in USDA Plant Hardiness Zone 5b. 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 | 12.3 °F | 29.9 °F | 3.21 in. |
| February | 13.8 °F | 32.1 °F | 2.81 in. |
| March | 20.8 °F | 40.4 °F | 3.6 in. |
| April | 32.8 °F | 54.1 °F | 3.82 in. |
| May | 44.1 °F | 67.0 °F | 3.93 in. |
| June | 52.9 °F | 75.5 °F | 4.69 in. |
| July | 57.3 °F | 79.5 °F | 4.46 in. |
| August | 55.9 °F | 77.8 °F | 4.37 in. |
| September | 49.0 °F | 71.3 °F | 4.08 in. |
| October | 38.4 °F | 58.3 °F | 4.21 in. |
| November | 29.0 °F | 45.8 °F | 3.56 in. |
| December | 20.1 °F | 34.9 °F | 3.65 in. |
| Annual | 35.5 °F | 55.6 °F | 46.39 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |