Parma Heights, Ohio has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.7 °C (low) to 15.3 °C (high). Annual precipitation averages 1102.9 Millimeters. Parma Heights 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 | -6.6 °C | 1.2 °C | 78.74 mm |
| February | -6.1 °C | 2.5 °C | 60.45 mm |
| March | -1.9 °C | 7.4 °C | 91.19 mm |
| April | 4.3 °C | 14.7 °C | 105.41 mm |
| May | 10.3 °C | 21 °C | 103.63 mm |
| June | 15.5 °C | 25.9 °C | 104.39 mm |
| July | 17.7 °C | 28.2 °C | 97.03 mm |
| August | 16.8 °C | 27.3 °C | 99.31 mm |
| September | 13.1 °C | 23.8 °C | 103.12 mm |
| October | 7.2 °C | 17 °C | 95.76 mm |
| November | 1.7 °C | 10.1 °C | 83.31 mm |
| December | -3.2 °C | 3.9 °C | 80.52 mm |
| Annual | 5.7 °C | 15.3 °C | 1102.86 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 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 |