Mount Pleasant, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40 °F (low) to 61.4 °F (high). Annual precipitation averages 45 Inches. Mount Pleasant 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. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.1 °F | 37.4 °F | 3.35 in. |
| February | 20.8 °F | 40.0 °F | 2.85 in. |
| March | 27.9 °F | 49.3 °F | 3.56 in. |
| April | 37.6 °F | 61.9 °F | 3.8 in. |
| May | 47.8 °F | 71.3 °F | 4.25 in. |
| June | 56.7 °F | 79.0 °F | 4.8 in. |
| July | 60.9 °F | 82.7 °F | 4.68 in. |
| August | 59.4 °F | 82.0 °F | 3.96 in. |
| September | 51.9 °F | 75.8 °F | 3.79 in. |
| October | 40.7 °F | 63.9 °F | 3.31 in. |
| November | 31.6 °F | 51.8 °F | 3.34 in. |
| December | 25.0 °F | 41.6 °F | 3.32 in. |
| Annual | 40 °F | 61.4 °F | 45.01 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 125-150 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |