Eddystone, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 48.6 °F (low) to 64.5 °F (high). Annual precipitation averages 46 Inches. Eddystone is located in USDA Plant Hardiness Zone 8a. The growing season typically runs from the last frost around Mar. 21 - Mar. 31 through the first frost around Nov. 1 - Nov. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 27.5 °F | 41.2 °F | 3.53 in. |
| February | 28.7 °F | 43.6 °F | 2.85 in. |
| March | 35.5 °F | 51.4 °F | 4.29 in. |
| April | 45.9 °F | 63.5 °F | 3.55 in. |
| May | 55.6 °F | 72.9 °F | 3.67 in. |
| June | 65.1 °F | 82.3 °F | 4.36 in. |
| July | 70.5 °F | 86.6 °F | 4.59 in. |
| August | 69.1 °F | 85.0 °F | 4.42 in. |
| September | 62.3 °F | 78.4 °F | 4.12 in. |
| October | 50.5 °F | 66.6 °F | 3.71 in. |
| November | 40.2 °F | 55.8 °F | 2.91 in. |
| December | 32.8 °F | 46.1 °F | 3.96 in. |
| Annual | 48.6 °F | 64.5 °F | 45.96 in. |
| Average First Frost Date | Nov. 1 - Nov. 10 |
| Average Last Frost Date | Mar. 21 - Mar. 31 |
| Average Days With Frost | 75-100 Days |
| Plant Hardiness Zone | Zone 8a : 10°F to 15°F |
| Plant Hardiness Zone - 2012 | Zone 7b : 5°F to 10°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |