Worthington, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4 °C (low) to 16.1 °C (high). Annual precipitation averages 1117.8 Millimeters. Worthington is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.4 °C | 2.1 °C | 84.07 mm |
| February | -6.8 °C | 3.8 °C | 65.28 mm |
| March | -3 °C | 8.9 °C | 83.31 mm |
| April | 2.6 °C | 16.6 °C | 96.01 mm |
| May | 8.3 °C | 22.2 °C | 99.31 mm |
| June | 13.2 °C | 26.4 °C | 119.13 mm |
| July | 15.4 °C | 28.4 °C | 118.36 mm |
| August | 14.6 °C | 27.8 °C | 101.85 mm |
| September | 10.7 °C | 24.2 °C | 101.09 mm |
| October | 4.7 °C | 17.4 °C | 79.76 mm |
| November | -0.3 °C | 10.6 °C | 83.82 mm |
| December | -4.2 °C | 4.6 °C | 85.85 mm |
| Annual | 4 °C | 16.1 °C | 1117.84 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |