Roseto, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 15.9 °C (high). Annual precipitation averages 1337.8 Millimeters. Roseto 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 | -6.6 °C | 2.5 °C | 97.28 mm |
| February | -6.1 °C | 4 °C | 76.2 mm |
| March | -2.3 °C | 8.5 °C | 100.33 mm |
| April | 3.6 °C | 15.7 °C | 107.19 mm |
| May | 9.3 °C | 21.3 °C | 109.47 mm |
| June | 14.4 °C | 25.9 °C | 130.05 mm |
| July | 17.2 °C | 28.6 °C | 124.46 mm |
| August | 16.2 °C | 27.5 °C | 123.19 mm |
| September | 12.1 °C | 23.8 °C | 134.37 mm |
| October | 6.1 °C | 17.3 °C | 128.02 mm |
| November | 0.3 °C | 10.9 °C | 93.47 mm |
| December | -3.8 °C | 5.2 °C | 113.79 mm |
| Annual | 5 °C | 15.9 °C | 1337.82 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |