Hookstown, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.5 °C (low) to 16.5 °C (high). Annual precipitation averages 1041.7 Millimeters. Hookstown is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.2 °C | 2.7 °C | 81.03 mm |
| February | -5.6 °C | 4.3 °C | 61.47 mm |
| March | -1.6 °C | 9.6 °C | 82.3 mm |
| April | 4.2 °C | 16.9 °C | 93.22 mm |
| May | 9.9 °C | 22.3 °C | 98.3 mm |
| June | 14.8 °C | 26.6 °C | 105.92 mm |
| July | 17.1 °C | 28.6 °C | 106.93 mm |
| August | 16.3 °C | 28 °C | 88.39 mm |
| September | 12.5 °C | 24.5 °C | 93.47 mm |
| October | 6.3 °C | 17.8 °C | 76.71 mm |
| November | 0.9 °C | 11.1 °C | 73.91 mm |
| December | -3.2 °C | 5.2 °C | 80.01 mm |
| Annual | 5.5 °C | 16.5 °C | 1041.66 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |