Leetsdale, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 42.8 °F (low) to 61.7 °F (high). Annual precipitation averages 40.3 Inches. Leetsdale is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.8 °F | 36.9 °F | 3.31 in. |
| February | 23.0 °F | 39.6 °F | 2.57 in. |
| March | 30.1 °F | 48.8 °F | 3.17 in. |
| April | 40.3 °F | 62.4 °F | 3.55 in. |
| May | 50.7 °F | 72.0 °F | 3.88 in. |
| June | 59.5 °F | 80.3 °F | 4.19 in. |
| July | 63.6 °F | 84.1 °F | 4.03 in. |
| August | 62.5 °F | 82.7 °F | 3.19 in. |
| September | 55.6 °F | 76.3 °F | 3.57 in. |
| October | 44.4 °F | 64.0 °F | 2.94 in. |
| November | 34.7 °F | 51.6 °F | 2.88 in. |
| December | 27.2 °F | 41.3 °F | 3.06 in. |
| Annual | 42.8 °F | 61.7 °F | 40.34 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| 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 |