Summit Hill, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 38.8 °F (low) to 58 °F (high). Annual precipitation averages 54.7 Inches. Summit Hill 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.4 °F | 33.4 °F | 3.89 in. |
| February | 18.6 °F | 36.4 °F | 3.08 in. |
| March | 25.8 °F | 44.7 °F | 4.18 in. |
| April | 36.4 °F | 57.8 °F | 4.52 in. |
| May | 46.8 °F | 68.4 °F | 4.44 in. |
| June | 55.6 °F | 76.0 °F | 5.58 in. |
| July | 60.2 °F | 80.5 °F | 5.09 in. |
| August | 58.3 °F | 78.8 °F | 4.86 in. |
| September | 51.6 °F | 72.2 °F | 5.39 in. |
| October | 40.7 °F | 60.8 °F | 5.19 in. |
| November | 31.2 °F | 48.7 °F | 4.07 in. |
| December | 23.0 °F | 38.3 °F | 4.4 in. |
| Annual | 38.8 °F | 58 °F | 54.69 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |