Roulette, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 1.5 °C (low) to 13.7 °C (high). Annual precipitation averages 1103.4 Millimeters. Roulette 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 | -10.1 °C | -0.4 °C | 81.03 mm |
| February | -9.7 °C | 1.2 °C | 56.39 mm |
| March | -5.9 °C | 6.1 °C | 78.23 mm |
| April | -0.2 °C | 13.6 °C | 95.25 mm |
| May | 5.6 °C | 20.3 °C | 98.04 mm |
| June | 10.4 °C | 24.3 °C | 106.68 mm |
| July | 12.8 °C | 26.3 °C | 110.24 mm |
| August | 12.2 °C | 25.4 °C | 104.9 mm |
| September | 8.6 °C | 21.9 °C | 101.85 mm |
| October | 2.6 °C | 15.1 °C | 100.08 mm |
| November | -2.1 °C | 8.2 °C | 89.15 mm |
| December | -6.3 °C | 2.1 °C | 81.53 mm |
| Annual | 1.5 °C | 13.7 °C | 1103.37 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 |