Marion Heights, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.5 °F (low) to 58.2 °F (high). Annual precipitation averages 49.4 Inches. Marion Heights is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 17.6 °F | 33.3 °F | 3.58 in. |
| February | 18.8 °F | 36.0 °F | 2.65 in. |
| March | 26.1 °F | 44.8 °F | 3.84 in. |
| April | 37.3 °F | 58.0 °F | 4.23 in. |
| May | 47.5 °F | 68.6 °F | 4.31 in. |
| June | 56.6 °F | 76.4 °F | 4.87 in. |
| July | 61.1 °F | 81.5 °F | 4.53 in. |
| August | 59.4 °F | 79.7 °F | 4.29 in. |
| September | 52.5 °F | 73.0 °F | 5.12 in. |
| October | 41.5 °F | 60.9 °F | 4.58 in. |
| November | 31.6 °F | 48.3 °F | 3.63 in. |
| December | 23.5 °F | 37.9 °F | 3.72 in. |
| Annual | 39.5 °F | 58.2 °F | 49.35 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6a : -10°F to -5°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |