Boyertown, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43 °F (low) to 63.1 °F (high). Annual precipitation averages 48.8 Inches. Boyertown is located in USDA Plant Hardiness Zone 7a. 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 | 21.8 °F | 38.7 °F | 3.42 in. |
| February | 23.1 °F | 41.4 °F | 2.74 in. |
| March | 30.4 °F | 50.0 °F | 4.0 in. |
| April | 40.7 °F | 62.6 °F | 3.84 in. |
| May | 50.6 °F | 72.4 °F | 4.08 in. |
| June | 59.9 °F | 81.3 °F | 4.61 in. |
| July | 64.7 °F | 86.0 °F | 4.95 in. |
| August | 63.1 °F | 84.2 °F | 4.5 in. |
| September | 55.7 °F | 77.5 °F | 5.02 in. |
| October | 44.2 °F | 65.2 °F | 4.27 in. |
| November | 34.4 °F | 53.9 °F | 3.27 in. |
| December | 27.4 °F | 43.6 °F | 4.07 in. |
| Annual | 43 °F | 63.1 °F | 48.77 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |