Trotwood, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.4 °C (low) to 17.2 °C (high). Annual precipitation averages 1052.6 Millimeters. Trotwood is located in USDA Plant Hardiness Zone 6b. 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 | -6.1 °C | 2.6 °C | 78.99 mm |
| February | -4.8 °C | 4.7 °C | 59.69 mm |
| March | -0.3 °C | 10.3 °C | 86.36 mm |
| April | 5.7 °C | 17.6 °C | 110.24 mm |
| May | 11.8 °C | 23.2 °C | 114.81 mm |
| June | 16.7 °C | 27.9 °C | 114.05 mm |
| July | 18.5 °C | 29.6 °C | 102.36 mm |
| August | 17.4 °C | 29.2 °C | 76.2 mm |
| September | 13.3 °C | 25.7 °C | 78.74 mm |
| October | 6.7 °C | 18.9 °C | 74.68 mm |
| November | 1.1 °C | 11.3 °C | 76.71 mm |
| December | -3.2 °C | 5 °C | 79.76 mm |
| Annual | 6.4 °C | 17.2 °C | 1052.59 mm |
| 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 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 |