Roulette, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.7 °F (low) to 56.6 °F (high). Annual precipitation averages 43.4 Inches. 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 | 13.9 °F | 31.3 °F | 3.19 in. |
| February | 14.6 °F | 34.1 °F | 2.22 in. |
| March | 21.3 °F | 43.0 °F | 3.08 in. |
| April | 31.6 °F | 56.5 °F | 3.75 in. |
| May | 42.1 °F | 68.5 °F | 3.86 in. |
| June | 50.7 °F | 75.7 °F | 4.2 in. |
| July | 55.0 °F | 79.3 °F | 4.34 in. |
| August | 54.0 °F | 77.7 °F | 4.13 in. |
| September | 47.4 °F | 71.4 °F | 4.01 in. |
| October | 36.7 °F | 59.2 °F | 3.94 in. |
| November | 28.3 °F | 46.7 °F | 3.51 in. |
| December | 20.6 °F | 35.8 °F | 3.21 in. |
| Annual | 34.7 °F | 56.6 °F | 43.44 in. |
| 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 : -15°F to -10°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |