Derby, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.6 °F (low) to 62.2 °F (high). Annual precipitation averages 41.2 Inches. Derby 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 | 20.8 °F | 36.1 °F | 3.14 in. |
| February | 22.6 °F | 39.6 °F | 2.36 in. |
| March | 30.6 °F | 50.0 °F | 3.37 in. |
| April | 41.0 °F | 63.0 °F | 3.73 in. |
| May | 52.1 °F | 73.3 °F | 4.62 in. |
| June | 61.0 °F | 81.4 °F | 4.51 in. |
| July | 64.0 °F | 84.2 °F | 4.1 in. |
| August | 62.0 °F | 83.1 °F | 3.67 in. |
| September | 54.6 °F | 77.8 °F | 3.03 in. |
| October | 43.4 °F | 65.5 °F | 2.64 in. |
| November | 33.2 °F | 51.8 °F | 3.13 in. |
| December | 26.2 °F | 40.8 °F | 2.85 in. |
| Annual | 42.6 °F | 62.2 °F | 41.15 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 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |