Webster, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.6 °F (low) to 63.1 °F (high). Annual precipitation averages 41 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.3 °F | 38.7 °F | 3.07 in. |
| February | 23.3 °F | 41.3 °F | 2.59 in. |
| March | 30.2 °F | 50.6 °F | 3.25 in. |
| April | 39.8 °F | 64.1 °F | 3.33 in. |
| May | 50.2 °F | 73.2 °F | 4.06 in. |
| June | 59.2 °F | 80.9 °F | 4.43 in. |
| July | 63.4 °F | 84.8 °F | 4.18 in. |
| August | 62.1 °F | 83.9 °F | 3.59 in. |
| September | 55.0 °F | 77.7 °F | 3.48 in. |
| October | 43.7 °F | 65.7 °F | 3.0 in. |
| November | 34.1 °F | 53.4 °F | 2.96 in. |
| December | 27.4 °F | 43.0 °F | 3.06 in. |
| Annual | 42.6 °F | 63.1 °F | 41 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 | Dfa - Humid Continental Hot Summers With Year Around Precipitation |