Marshallton, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.3 °C (low) to 15.5 °C (high). Annual precipitation averages 1209.8 Millimeters. Marshallton is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -5.6 °C | 4.2 °C | 90.93 mm |
| February | -5.2 °C | 5.4 °C | 75.95 mm |
| March | -1.1 °C | 10.2 °C | 110.24 mm |
| April | 4.7 °C | 17.1 °C | 96.27 mm |
| May | 10.2 °C | 22.4 °C | 99.82 mm |
| June | 15.3 °C | 27.2 °C | 113.79 mm |
| July | 18.2 °C | 29.7 °C | 115.06 mm |
| August | 17.2 °C | 29 °C | 111.25 mm |
| September | 13 °C | 25.3 °C | 128.27 mm |
| October | 6.4 °C | 18.8 °C | 117.35 mm |
| November | 1.1 °C | 12.2 °C | 85.09 mm |
| December | -2.7 °C | 6.6 °C | 111 mm |
| Annual | 6 °C | 17.3 °C | 1255.02 mm |
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -7.6 °C | 1.7 °C | 92.96 mm |
| February | -6.8 °C | 3.3 °C | 71.37 mm |
| March | -2.6 °C | 8.2 °C | 97.54 mm |
| April | 3.3 °C | 15.4 °C | 104.39 mm |
| May | 8.7 °C | 21.2 °C | 98.81 mm |
| June | 13.7 °C | 25.6 °C | 116.59 mm |
| July | 15.9 °C | 28.3 °C | 105.41 mm |
| August | 15 °C | 27.3 °C | 103.89 mm |
| September | 11.1 °C | 23.6 °C | 130.05 mm |
| October | 5.1 °C | 16.8 °C | 109.22 mm |
| November | 0 °C | 10.2 °C | 84.84 mm |
| December | -4.2 °C | 4.3 °C | 94.74 mm |
| Annual | 4.3 °C | 15.5 °C | 1209.81 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 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 |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| 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 | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |