Douglassville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 6.6 °C (low) to 17.6 °C (high). Annual precipitation averages 1224.3 Millimeters. Douglassville is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.3 °C | 4.1 °C | 86.87 mm |
| February | -4.6 °C | 5.7 °C | 70.87 mm |
| March | -0.4 °C | 10.3 °C | 100.58 mm |
| April | 5.3 °C | 17.4 °C | 95.25 mm |
| May | 10.8 °C | 22.8 °C | 98.3 mm |
| June | 16.2 °C | 27.6 °C | 113.28 mm |
| July | 18.8 °C | 30.1 °C | 120.65 mm |
| August | 17.9 °C | 29.2 °C | 110.49 mm |
| September | 13.7 °C | 25.6 °C | 131.06 mm |
| October | 7.3 °C | 18.9 °C | 111.51 mm |
| November | 1.5 °C | 12.6 °C | 83.31 mm |
| December | -2.3 °C | 6.9 °C | 102.11 mm |
| Annual | 6.6 °C | 17.6 °C | 1224.28 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |