Grove City, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.6 °C (low) to 15.5 °C (high). Annual precipitation averages 1118.6 Millimeters. Grove City is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -8.1 °C | 1.5 °C | 81.03 mm |
| February | -7.6 °C | 3.2 °C | 64.26 mm |
| March | -3.5 °C | 8.3 °C | 82.8 mm |
| April | 2.3 °C | 15.6 °C | 100.08 mm |
| May | 7.9 °C | 21.3 °C | 99.06 mm |
| June | 12.9 °C | 25.8 °C | 121.67 mm |
| July | 15.1 °C | 28.1 °C | 118.11 mm |
| August | 14.3 °C | 27.4 °C | 96.77 mm |
| September | 10.5 °C | 23.9 °C | 102.36 mm |
| October | 4.6 °C | 17.1 °C | 85.34 mm |
| November | -0.3 °C | 10 °C | 83.57 mm |
| December | -4.7 °C | 4 °C | 83.57 mm |
| Annual | 3.6 °C | 15.5 °C | 1118.62 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |