Roseville, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 2 °C (low) to 14.1 °C (high). Annual precipitation averages 985.5 Millimeters. Roseville is located in USDA Plant Hardiness Zone 5b. 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 | -10 °C | -0.2 °C | 64.77 mm |
| February | -9.6 °C | 1.4 °C | 50.04 mm |
| March | -5.8 °C | 6.1 °C | 72.39 mm |
| April | 0.1 °C | 13.9 °C | 84.58 mm |
| May | 6.3 °C | 20.6 °C | 85.34 mm |
| June | 11.3 °C | 24.9 °C | 102.36 mm |
| July | 13.7 °C | 27.1 °C | 97.28 mm |
| August | 13 °C | 26.3 °C | 92.96 mm |
| September | 9.1 °C | 22.6 °C | 104.9 mm |
| October | 3.3 °C | 15.6 °C | 90.93 mm |
| November | -1.7 °C | 8.2 °C | 70.87 mm |
| December | -6.1 °C | 2.4 °C | 69.09 mm |
| Annual | 2 °C | 14.1 °C | 985.51 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°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 |