Duncansville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.2 °F (low) to 60.7 °F (high). Annual precipitation averages 40.3 Inches. Duncansville is located in USDA Plant Hardiness Zone 6b. 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 | 19.7 °F | 36.2 °F | 2.74 in. |
| February | 20.7 °F | 39.3 °F | 2.34 in. |
| March | 27.3 °F | 47.9 °F | 3.22 in. |
| April | 37.7 °F | 61.1 °F | 3.33 in. |
| May | 48.0 °F | 70.9 °F | 4.04 in. |
| June | 57.0 °F | 78.9 °F | 3.78 in. |
| July | 61.2 °F | 83.4 °F | 3.51 in. |
| August | 59.7 °F | 81.8 °F | 3.61 in. |
| September | 52.7 °F | 74.8 °F | 4.05 in. |
| October | 41.4 °F | 63.0 °F | 3.46 in. |
| November | 31.8 °F | 51.2 °F | 3.12 in. |
| December | 24.7 °F | 40.2 °F | 3.11 in. |
| Annual | 40.2 °F | 60.7 °F | 40.31 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |