Webster, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 40 °F (low) to 57.5 °F (high). Annual precipitation averages 35.9 Inches. Webster 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.0 °F | 33.1 °F | 2.64 in. |
| February | 18.7 °F | 34.5 °F | 2.09 in. |
| March | 25.5 °F | 42.5 °F | 2.53 in. |
| April | 35.9 °F | 55.1 °F | 2.97 in. |
| May | 46.7 °F | 67.7 °F | 3.0 in. |
| June | 56.5 °F | 75.9 °F | 3.34 in. |
| July | 62.2 °F | 80.9 °F | 3.5 in. |
| August | 60.8 °F | 79.6 °F | 3.3 in. |
| September | 54.1 °F | 73.3 °F | 3.23 in. |
| October | 43.1 °F | 60.5 °F | 3.6 in. |
| November | 33.3 °F | 48.9 °F | 2.87 in. |
| December | 24.6 °F | 38.0 °F | 2.84 in. |
| Annual | 40 °F | 57.5 °F | 35.91 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 |