Powell, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.7 °F (low) to 61.9 °F (high). Annual precipitation averages 41 Inches. Powell 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 | 20.6 °F | 35.6 °F | 2.98 in. |
| February | 22.4 °F | 38.8 °F | 2.37 in. |
| March | 30.7 °F | 49.7 °F | 3.36 in. |
| April | 41.0 °F | 62.7 °F | 3.86 in. |
| May | 51.9 °F | 73.2 °F | 4.2 in. |
| June | 61.0 °F | 81.3 °F | 4.47 in. |
| July | 64.3 °F | 84.1 °F | 4.16 in. |
| August | 62.4 °F | 83.0 °F | 3.4 in. |
| September | 55.1 °F | 77.6 °F | 3.27 in. |
| October | 43.6 °F | 65.0 °F | 2.85 in. |
| November | 33.5 °F | 51.6 °F | 3.0 in. |
| December | 26.2 °F | 40.4 °F | 3.08 in. |
| Annual | 42.7 °F | 61.9 °F | 41 in. |
| 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 : -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 |