Dormont, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.8 °C (low) to 16.2 °C (high). Annual precipitation averages 1056.1 Millimeters. Dormont 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 | -6.1 °C | 2.4 °C | 83.06 mm |
| February | -5.2 °C | 4 °C | 66.04 mm |
| March | -1.3 °C | 9.2 °C | 84.84 mm |
| April | 4.6 °C | 16.7 °C | 88.14 mm |
| May | 10.4 °C | 22.1 °C | 101.85 mm |
| June | 15.2 °C | 26.4 °C | 107.95 mm |
| July | 17.5 °C | 28.4 °C | 109.98 mm |
| August | 16.6 °C | 27.8 °C | 87.88 mm |
| September | 12.8 °C | 24.3 °C | 89.66 mm |
| October | 6.4 °C | 17.5 °C | 78.49 mm |
| November | 1.2 °C | 10.7 °C | 76.45 mm |
| December | -3.1 °C | 4.9 °C | 81.79 mm |
| Annual | 5.8 °C | 16.2 °C | 1056.13 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 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |