York, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.8 °F (low) to 63.9 °F (high). Annual precipitation averages 44.6 Inches. York is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.9 °F | 39.6 °F | 3.17 in. |
| February | 23.8 °F | 42.3 °F | 2.69 in. |
| March | 31.5 °F | 51.2 °F | 3.88 in. |
| April | 41.5 °F | 64.1 °F | 3.49 in. |
| May | 51.4 °F | 73.8 °F | 3.99 in. |
| June | 61.1 °F | 82.1 °F | 4.02 in. |
| July | 65.3 °F | 86.4 °F | 4.22 in. |
| August | 63.5 °F | 84.7 °F | 3.95 in. |
| September | 56.4 °F | 78.0 °F | 4.81 in. |
| October | 45.1 °F | 66.0 °F | 3.85 in. |
| November | 35.1 °F | 54.4 °F | 3.08 in. |
| December | 27.6 °F | 43.6 °F | 3.49 in. |
| Annual | 43.8 °F | 63.9 °F | 44.64 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |