Blue Bell, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.8 °F (low) to 63.4 °F (high). Annual precipitation averages 48.1 Inches. Blue Bell 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 | 23.6 °F | 39.6 °F | 3.39 in. |
| February | 25.1 °F | 42.3 °F | 2.83 in. |
| March | 32.0 °F | 50.5 °F | 4.13 in. |
| April | 42.0 °F | 62.6 °F | 3.76 in. |
| May | 52.1 °F | 72.3 °F | 4.08 in. |
| June | 61.6 °F | 81.3 °F | 4.39 in. |
| July | 66.9 °F | 85.9 °F | 4.65 in. |
| August | 65.2 °F | 84.2 °F | 4.77 in. |
| September | 57.9 °F | 77.7 °F | 4.42 in. |
| October | 46.1 °F | 65.5 °F | 4.06 in. |
| November | 36.1 °F | 54.5 °F | 3.25 in. |
| December | 28.8 °F | 44.5 °F | 4.36 in. |
| Annual | 44.8 °F | 63.4 °F | 48.09 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 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |