Herminie, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 41.3 °F (low) to 62.2 °F (high). Annual precipitation averages 41.7 Inches. Herminie is located in USDA Plant Hardiness Zone 6b. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 21 - Oct. 31.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 21.1 °F | 37.9 °F | 3.12 in. |
| February | 21.8 °F | 40.4 °F | 2.6 in. |
| March | 28.9 °F | 49.6 °F | 3.22 in. |
| April | 38.7 °F | 62.8 °F | 3.4 in. |
| May | 49.2 °F | 72.4 °F | 4.0 in. |
| June | 58.1 °F | 80.3 °F | 4.41 in. |
| July | 62.4 °F | 84.1 °F | 4.37 in. |
| August | 60.9 °F | 83.2 °F | 3.67 in. |
| September | 53.7 °F | 76.8 °F | 3.67 in. |
| October | 42.4 °F | 64.6 °F | 3.12 in. |
| November | 32.7 °F | 52.3 °F | 3.01 in. |
| December | 26.2 °F | 42.0 °F | 3.1 in. |
| Annual | 41.3 °F | 62.2 °F | 41.69 in. |
| Average First Frost Date | Oct. 21 - Oct. 31 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 |