Swanton, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.8 °C (low) to 15.4 °C (high). Annual precipitation averages 907.8 Millimeters. Swanton is located in USDA Plant Hardiness Zone 6a. 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 | -7.8 °C | 0.2 °C | 59.69 mm |
| February | -7 °C | 2 °C | 52.58 mm |
| March | -2.6 °C | 7.7 °C | 63.25 mm |
| April | 3.4 °C | 15.1 °C | 86.36 mm |
| May | 9.9 °C | 21.6 °C | 100.84 mm |
| June | 15.3 °C | 26.9 °C | 93.22 mm |
| July | 17.2 °C | 29 °C | 86.87 mm |
| August | 16 °C | 27.8 °C | 88.14 mm |
| September | 11.8 °C | 24.5 °C | 75.69 mm |
| October | 5.6 °C | 17.3 °C | 71.12 mm |
| November | 0.1 °C | 9.5 °C | 70.36 mm |
| December | -4.5 °C | 3.1 °C | 59.69 mm |
| Annual | 4.8 °C | 15.4 °C | 907.81 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 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 |