Broomall, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 46.8 °F (low) to 64.1 °F (high). Annual precipitation averages 47.6 Inches. Broomall is located in USDA Plant Hardiness Zone 7b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 25.8 °F | 40.1 °F | 3.52 in. |
| February | 27.1 °F | 42.7 °F | 2.87 in. |
| March | 33.6 °F | 51.7 °F | 4.31 in. |
| April | 43.9 °F | 63.8 °F | 3.67 in. |
| May | 53.5 °F | 73.3 °F | 3.91 in. |
| June | 63.0 °F | 82.4 °F | 4.38 in. |
| July | 68.7 °F | 86.7 °F | 4.53 in. |
| August | 67.2 °F | 85.0 °F | 4.67 in. |
| September | 60.4 °F | 78.9 °F | 4.42 in. |
| October | 48.6 °F | 65.4 °F | 3.92 in. |
| November | 38.5 °F | 54.6 °F | 3.13 in. |
| December | 30.9 °F | 44.8 °F | 4.25 in. |
| Annual | 46.8 °F | 64.1 °F | 47.58 in. |
| 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 7b : 5°F to 10°F |
| Plant Hardiness Zone - 2012 | Zone 7a : 0°F to 5°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |