Shartlesville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.9 °F (low) to 61.8 °F (high). Annual precipitation averages 50.7 Inches. 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 | 19.8 °F | 37.1 °F | 3.66 in. |
| February | 21.0 °F | 39.9 °F | 2.84 in. |
| March | 28.6 °F | 48.6 °F | 3.9 in. |
| April | 38.6 °F | 61.5 °F | 3.98 in. |
| May | 48.8 °F | 71.5 °F | 4.07 in. |
| June | 58.1 °F | 80.2 °F | 5.3 in. |
| July | 62.5 °F | 84.9 °F | 5.09 in. |
| August | 60.8 °F | 83.2 °F | 4.61 in. |
| September | 53.5 °F | 76.3 °F | 5.2 in. |
| October | 41.8 °F | 64.5 °F | 4.45 in. |
| November | 32.4 °F | 52.4 °F | 3.59 in. |
| December | 25.2 °F | 41.8 °F | 4.02 in. |
| Annual | 40.9 °F | 61.8 °F | 50.71 in. |
| 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 : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |