Charleroi, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.4 °F (low) to 63.3 °F (high). Annual precipitation averages 41.6 Inches. Charleroi is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 22.2 °F | 38.9 °F | 3.1 in. |
| February | 23.1 °F | 41.4 °F | 2.7 in. |
| March | 30.1 °F | 50.9 °F | 3.41 in. |
| April | 39.6 °F | 64.2 °F | 3.4 in. |
| May | 50.0 °F | 73.3 °F | 4.14 in. |
| June | 59.0 °F | 81.0 °F | 4.44 in. |
| July | 63.1 °F | 84.9 °F | 4.15 in. |
| August | 61.9 °F | 84.1 °F | 3.65 in. |
| September | 54.7 °F | 77.9 °F | 3.43 in. |
| October | 43.4 °F | 65.8 °F | 2.99 in. |
| November | 33.9 °F | 53.6 °F | 3.07 in. |
| December | 27.2 °F | 43.2 °F | 3.15 in. |
| Annual | 42.4 °F | 63.3 °F | 41.63 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |