Lyndonville, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 41.3 °F (low) to 57.7 °F (high). Annual precipitation averages 34.1 Inches. Lyndonville is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 19.7 °F | 33.3 °F | 2.64 in. |
| February | 20.4 °F | 34.9 °F | 2.23 in. |
| March | 26.7 °F | 42.6 °F | 2.35 in. |
| April | 36.4 °F | 54.9 °F | 2.92 in. |
| May | 47.2 °F | 68.0 °F | 2.8 in. |
| June | 57.7 °F | 76.4 °F | 2.94 in. |
| July | 63.5 °F | 80.9 °F | 3.11 in. |
| August | 62.5 °F | 79.8 °F | 2.95 in. |
| September | 55.6 °F | 72.5 °F | 3.26 in. |
| October | 44.8 °F | 60.7 °F | 3.36 in. |
| November | 35.0 °F | 49.0 °F | 2.72 in. |
| December | 26.3 °F | 38.8 °F | 2.79 in. |
| Annual | 41.3 °F | 57.7 °F | 34.07 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |