Rome, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2.9 °C (low) to 14.8 °C (high). Annual precipitation averages 966.5 Millimeters. Rome 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.1 °C | 0.6 °C | 55.63 mm |
| February | -8.7 °C | 1.9 °C | 46.23 mm |
| March | -4.8 °C | 6.8 °C | 69.85 mm |
| April | 0.9 °C | 14.4 °C | 87.63 mm |
| May | 7.2 °C | 21.1 °C | 86.11 mm |
| June | 12.3 °C | 25.7 °C | 106.43 mm |
| July | 14.7 °C | 28 °C | 91.44 mm |
| August | 14.1 °C | 27.3 °C | 96.27 mm |
| September | 10.1 °C | 23.3 °C | 98.04 mm |
| October | 3.9 °C | 16.3 °C | 89.41 mm |
| November | -1.2 °C | 9.1 °C | 70.87 mm |
| December | -5.2 °C | 3.4 °C | 68.58 mm |
| Annual | 2.9 °C | 14.8 °C | 966.49 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 |