Mount Carmel, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 39.5 °F (low) to 59.3 °F (high). Annual precipitation averages 50.2 Inches. Mount Carmel 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 | 17.8 °F | 34.5 °F | 3.62 in. |
| February | 19.2 °F | 37.2 °F | 2.73 in. |
| March | 26.8 °F | 46.0 °F | 3.99 in. |
| April | 37.5 °F | 59.0 °F | 4.14 in. |
| May | 47.4 °F | 69.6 °F | 4.3 in. |
| June | 56.3 °F | 77.4 °F | 4.75 in. |
| July | 60.5 °F | 82.5 °F | 4.74 in. |
| August | 58.7 °F | 80.7 °F | 4.39 in. |
| September | 52.0 °F | 73.9 °F | 5.23 in. |
| October | 41.2 °F | 61.7 °F | 4.75 in. |
| November | 31.9 °F | 49.5 °F | 3.67 in. |
| December | 24.1 °F | 39.1 °F | 3.88 in. |
| Annual | 39.5 °F | 59.3 °F | 50.19 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 |