Shartlesville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.9 °C (low) to 16.6 °C (high). Annual precipitation averages 1288 Millimeters. Shartlesville 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.8 °C | 2.8 °C | 92.96 mm |
| February | -6.1 °C | 4.4 °C | 72.14 mm |
| March | -1.9 °C | 9.2 °C | 99.06 mm |
| April | 3.7 °C | 16.4 °C | 101.09 mm |
| May | 9.3 °C | 21.9 °C | 103.38 mm |
| June | 14.5 °C | 26.8 °C | 134.62 mm |
| July | 16.9 °C | 29.4 °C | 129.29 mm |
| August | 16 °C | 28.4 °C | 117.09 mm |
| September | 11.9 °C | 24.6 °C | 132.08 mm |
| October | 5.4 °C | 18.1 °C | 113.03 mm |
| November | 0.2 °C | 11.3 °C | 91.19 mm |
| December | -3.8 °C | 5.4 °C | 102.11 mm |
| Annual | 4.9 °C | 16.6 °C | 1288.04 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |