Eighty Four, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.9 °F (low) to 62.1 °F (high). Annual precipitation averages 41.5 Inches. Eighty Four 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 20.5 °F | 37.5 °F | 3.23 in. |
| February | 21.9 °F | 40.3 °F | 2.45 in. |
| March | 28.9 °F | 49.6 °F | 3.4 in. |
| April | 38.4 °F | 62.8 °F | 3.28 in. |
| May | 48.5 °F | 72.2 °F | 4.27 in. |
| June | 57.5 °F | 79.8 °F | 4.41 in. |
| July | 61.6 °F | 84.1 °F | 4.17 in. |
| August | 60.2 °F | 82.9 °F | 3.51 in. |
| September | 53.4 °F | 76.6 °F | 3.51 in. |
| October | 41.9 °F | 64.5 °F | 3.05 in. |
| November | 32.7 °F | 52.4 °F | 3.02 in. |
| December | 25.8 °F | 42.1 °F | 3.18 in. |
| Annual | 40.9 °F | 62.1 °F | 41.48 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| 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 |