Whitehall, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.9 °C (low) to 16 °C (high). Annual precipitation averages 1065.5 Millimeters. Whitehall is located in USDA Plant Hardiness Zone 6b. 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 | -6 °C | 2.3 °C | 82.04 mm |
| February | -5.2 °C | 3.8 °C | 65.53 mm |
| March | -1.2 °C | 9.1 °C | 84.84 mm |
| April | 4.9 °C | 16.6 °C | 86.36 mm |
| May | 10.7 °C | 21.8 °C | 104.39 mm |
| June | 15.5 °C | 26.2 °C | 112.01 mm |
| July | 17.7 °C | 28.3 °C | 112.52 mm |
| August | 16.8 °C | 27.6 °C | 90.93 mm |
| September | 12.9 °C | 24 °C | 90.93 mm |
| October | 6.6 °C | 17.3 °C | 77.47 mm |
| November | 1.3 °C | 10.4 °C | 77.22 mm |
| December | -2.9 °C | 4.7 °C | 81.28 mm |
| Annual | 5.9 °C | 16 °C | 1065.52 mm |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |