Dayton, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44 °F (low) to 63.5 °F (high). Annual precipitation averages 41.5 Inches. Dayton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 1 - Apr. 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.8 °F | 37.2 °F | 3.14 in. |
| February | 24.1 °F | 41.1 °F | 2.35 in. |
| March | 31.8 °F | 51.2 °F | 3.46 in. |
| April | 42.5 °F | 64.3 °F | 4.38 in. |
| May | 53.7 °F | 74.5 °F | 4.46 in. |
| June | 62.6 °F | 82.9 °F | 4.55 in. |
| July | 65.8 °F | 85.9 °F | 4.07 in. |
| August | 63.9 °F | 85.1 °F | 2.99 in. |
| September | 56.2 °F | 78.8 °F | 3.08 in. |
| October | 44.3 °F | 66.7 °F | 2.91 in. |
| November | 34.3 °F | 52.8 °F | 3.01 in. |
| December | 26.7 °F | 41.6 °F | 3.12 in. |
| Annual | 44 °F | 63.5 °F | 41.52 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 1 - Apr. 10 |
| 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 |