Avondale, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.4 °C (low) to 17.5 °C (high). Annual precipitation averages 1227.1 Millimeters. Avondale 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 | -5.2 °C | 4.6 °C | 87.38 mm |
| February | -4.8 °C | 5.7 °C | 72.39 mm |
| March | -0.7 °C | 10.4 °C | 109.98 mm |
| April | 5.1 °C | 17.1 °C | 96.52 mm |
| May | 10.6 °C | 22.4 °C | 99.82 mm |
| June | 15.6 °C | 27.3 °C | 112.78 mm |
| July | 18.6 °C | 29.8 °C | 129.54 mm |
| August | 17.7 °C | 28.9 °C | 107.7 mm |
| September | 13.6 °C | 25.4 °C | 119.38 mm |
| October | 6.8 °C | 18.9 °C | 111 mm |
| November | 1.5 °C | 12.3 °C | 84.58 mm |
| December | -2.3 °C | 6.8 °C | 96.01 mm |
| Annual | 6.4 °C | 17.5 °C | 1227.08 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 7a : -17.8°C to -15°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |