Shrewsbury, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 44.3 °F (low) to 63.3 °F (high). Annual precipitation averages 47.7 Inches. Shrewsbury 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. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 23.9 °F | 39.4 °F | 3.46 in. |
| February | 25.7 °F | 42.9 °F | 2.85 in. |
| March | 32.0 °F | 51.7 °F | 4.14 in. |
| April | 42.4 °F | 64.0 °F | 3.77 in. |
| May | 51.5 °F | 72.9 °F | 4.12 in. |
| June | 60.4 °F | 80.5 °F | 4.04 in. |
| July | 64.8 °F | 84.9 °F | 4.61 in. |
| August | 63.0 °F | 83.0 °F | 4.13 in. |
| September | 56.8 °F | 76.9 °F | 5.03 in. |
| October | 45.8 °F | 65.4 °F | 4.25 in. |
| November | 36.4 °F | 54.1 °F | 3.38 in. |
| December | 28.9 °F | 43.7 °F | 3.89 in. |
| Annual | 44.3 °F | 63.3 °F | 47.67 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| 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 7a : 0°F to 5°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |