Worthington, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.2 °C (low) to 16.9 °C (high). Annual precipitation averages 1041.2 Millimeters. Worthington 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 | -6.1 °C | 2.3 °C | 75.69 mm |
| February | -5.1 °C | 4.2 °C | 60.71 mm |
| March | -0.4 °C | 10.1 °C | 85.6 mm |
| April | 5.3 °C | 17.5 °C | 98.81 mm |
| May | 11.3 °C | 23.2 °C | 106.43 mm |
| June | 16.3 °C | 27.7 °C | 115.32 mm |
| July | 18.2 °C | 29.3 °C | 105.41 mm |
| August | 17.2 °C | 28.7 °C | 86.11 mm |
| September | 13.2 °C | 25.6 °C | 81.79 mm |
| October | 6.7 °C | 18.6 °C | 72.14 mm |
| November | 1.1 °C | 11.1 °C | 74.93 mm |
| December | -2.9 °C | 4.8 °C | 78.23 mm |
| Annual | 6.2 °C | 16.9 °C | 1041.17 mm |
| 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 : -20.6°C to -17.8°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 |