Connellsville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 62.9 °F (high). Annual precipitation averages 45.7 Inches. Connellsville 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.3 °F | 38.7 °F | 3.34 in. |
| February | 22.2 °F | 41.5 °F | 2.87 in. |
| March | 29.2 °F | 50.8 °F | 3.47 in. |
| April | 38.6 °F | 63.6 °F | 3.9 in. |
| May | 49.1 °F | 73.0 °F | 4.76 in. |
| June | 57.9 °F | 80.7 °F | 4.83 in. |
| July | 62.1 °F | 84.4 °F | 4.77 in. |
| August | 60.8 °F | 83.7 °F | 3.92 in. |
| September | 53.5 °F | 77.3 °F | 3.72 in. |
| October | 42.2 °F | 65.5 °F | 3.28 in. |
| November | 32.6 °F | 53.0 °F | 3.41 in. |
| December | 26.2 °F | 42.9 °F | 3.47 in. |
| Annual | 41.3 °F | 62.9 °F | 45.74 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 |