Whitehall, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.7 °F (low) to 60.8 °F (high). Annual precipitation averages 42 Inches. 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 | 21.2 °F | 36.1 °F | 3.23 in. |
| February | 22.7 °F | 38.8 °F | 2.58 in. |
| March | 29.9 °F | 48.3 °F | 3.34 in. |
| April | 40.8 °F | 61.8 °F | 3.4 in. |
| May | 51.3 °F | 71.2 °F | 4.11 in. |
| June | 59.9 °F | 79.1 °F | 4.41 in. |
| July | 63.9 °F | 82.9 °F | 4.43 in. |
| August | 62.3 °F | 81.6 °F | 3.58 in. |
| September | 55.3 °F | 75.2 °F | 3.58 in. |
| October | 43.9 °F | 63.1 °F | 3.05 in. |
| November | 34.4 °F | 50.8 °F | 3.04 in. |
| December | 26.7 °F | 40.4 °F | 3.2 in. |
| Annual | 42.7 °F | 60.8 °F | 41.95 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |