Highland Hills, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.7 °C (low) to 14.9 °C (high). Annual precipitation averages 1161.5 Millimeters. Highland Hills 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.6 °C | 0.7 °C | 85.85 mm |
| February | -7.2 °C | 2.1 °C | 62.99 mm |
| March | -3.1 °C | 7.1 °C | 86.61 mm |
| April | 3.2 °C | 14.5 °C | 100.84 mm |
| May | 9.1 °C | 21.2 °C | 105.92 mm |
| June | 14.3 °C | 25.7 °C | 107.44 mm |
| July | 16.6 °C | 28.1 °C | 112.52 mm |
| August | 15.7 °C | 27.1 °C | 104.65 mm |
| September | 12 °C | 23.4 °C | 108.46 mm |
| October | 6.2 °C | 16.4 °C | 104.14 mm |
| November | 0.9 °C | 9.4 °C | 92.71 mm |
| December | -3.9 °C | 3.3 °C | 89.41 mm |
| Annual | 4.7 °C | 14.9 °C | 1161.54 mm |
| 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 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 |