Meridian, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.6 °F (low) to 60.3 °F (high). Annual precipitation averages 42.7 Inches. Meridian is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 18.8 °F | 35.3 °F | 3.32 in. |
| February | 20.0 °F | 38.5 °F | 2.52 in. |
| March | 26.8 °F | 47.5 °F | 3.24 in. |
| April | 37.3 °F | 60.8 °F | 3.74 in. |
| May | 47.6 °F | 71.0 °F | 3.81 in. |
| June | 56.5 °F | 78.9 °F | 4.33 in. |
| July | 60.2 °F | 82.4 °F | 4.23 in. |
| August | 58.4 °F | 81.2 °F | 3.9 in. |
| September | 51.7 °F | 74.9 °F | 3.87 in. |
| October | 40.7 °F | 62.5 °F | 3.22 in. |
| November | 32.0 °F | 50.8 °F | 3.33 in. |
| December | 24.6 °F | 39.9 °F | 3.2 in. |
| Annual | 39.6 °F | 60.3 °F | 42.71 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 11 - May 20 |
| 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 |