Chalkhill, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39 °F (low) to 58.8 °F (high). Annual precipitation averages 54.7 Inches. Chalkhill is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.9 °F | 34.9 °F | 4.56 in. |
| February | 20.1 °F | 38.1 °F | 3.68 in. |
| March | 27.4 °F | 47.0 °F | 4.66 in. |
| April | 37.3 °F | 60.5 °F | 4.65 in. |
| May | 46.9 °F | 69.4 °F | 5.05 in. |
| June | 55.2 °F | 76.2 °F | 5.55 in. |
| July | 59.3 °F | 79.5 °F | 5.23 in. |
| August | 57.8 °F | 78.4 °F | 4.52 in. |
| September | 50.7 °F | 72.5 °F | 4.41 in. |
| October | 40.6 °F | 61.4 °F | 3.92 in. |
| November | 30.9 °F | 49.2 °F | 4.09 in. |
| December | 23.4 °F | 38.9 °F | 4.33 in. |
| Annual | 39 °F | 58.8 °F | 54.65 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |