South Coatesville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.9 °C (low) to 17.2 °C (high). Annual precipitation averages 1293.9 Millimeters. South Coatesville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.6 °C | 4.1 °C | 95 mm |
| February | -5.2 °C | 5.2 °C | 76.96 mm |
| March | -1.1 °C | 10.1 °C | 110.49 mm |
| April | 4.7 °C | 16.9 °C | 99.82 mm |
| May | 10.1 °C | 22.3 °C | 102.11 mm |
| June | 15.1 °C | 27.1 °C | 122.17 mm |
| July | 18.2 °C | 29.4 °C | 124.71 mm |
| August | 17.2 °C | 28.8 °C | 114.55 mm |
| September | 13 °C | 25.2 °C | 128.52 mm |
| October | 6.4 °C | 18.7 °C | 119.63 mm |
| November | 1.2 °C | 12.1 °C | 88.9 mm |
| December | -2.7 °C | 6.4 °C | 111 mm |
| Annual | 5.9 °C | 17.2 °C | 1293.86 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |