Alleghenyville, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 43.2 °F (low) to 62 °F (high). Annual precipitation averages 49.1 Inches. Alleghenyville is located in USDA Plant Hardiness Zone 7a. 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 | 22.2 °F | 38.3 °F | 3.35 in. |
| February | 23.2 °F | 40.7 °F | 2.75 in. |
| March | 30.5 °F | 49.2 °F | 4.09 in. |
| April | 40.7 °F | 61.6 °F | 3.82 in. |
| May | 50.5 °F | 71.2 °F | 3.91 in. |
| June | 59.8 °F | 79.8 °F | 4.7 in. |
| July | 64.9 °F | 84.1 °F | 4.84 in. |
| August | 63.2 °F | 82.4 °F | 4.42 in. |
| September | 56.1 °F | 76.3 °F | 5.2 in. |
| October | 44.6 °F | 64.3 °F | 4.63 in. |
| November | 35.3 °F | 53.2 °F | 3.45 in. |
| December | 27.6 °F | 42.9 °F | 3.92 in. |
| Annual | 43.2 °F | 62 °F | 49.08 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 7a : 0°F to 5°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |