Eddystone, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 9.2 °C (low) to 18 °C (high). Annual precipitation averages 1167.4 Millimeters. 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 | -2.5 °C | 5.1 °C | 89.66 mm |
| February | -1.8 °C | 6.4 °C | 72.39 mm |
| March | 1.9 °C | 10.8 °C | 108.97 mm |
| April | 7.7 °C | 17.5 °C | 90.17 mm |
| May | 13.1 °C | 22.7 °C | 93.22 mm |
| June | 18.4 °C | 27.9 °C | 110.74 mm |
| July | 21.4 °C | 30.3 °C | 116.59 mm |
| August | 20.6 °C | 29.4 °C | 112.27 mm |
| September | 16.8 °C | 25.8 °C | 104.65 mm |
| October | 10.3 °C | 19.2 °C | 94.23 mm |
| November | 4.6 °C | 13.2 °C | 73.91 mm |
| December | 0.4 °C | 7.8 °C | 100.58 mm |
| Annual | 9.2 °C | 18 °C | 1167.38 mm |
| 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 : -12.2°C to -9.4°C |
| Plant Hardiness Zone - 2012 | Zone 7b : -15°C to -12.2°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |