Walnutport, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5.2 °C (low) to 16.6 °C (high). Annual precipitation averages 1248.2 Millimeters. Walnutport is located in USDA Plant Hardiness Zone 7a. 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 | -6.4 °C | 3 °C | 87.63 mm |
| February | -5.8 °C | 4.6 °C | 68.33 mm |
| March | -1.7 °C | 9.3 °C | 91.69 mm |
| April | 3.9 °C | 16.5 °C | 96.27 mm |
| May | 9.6 °C | 22.2 °C | 102.36 mm |
| June | 14.6 °C | 26.8 °C | 125.98 mm |
| July | 17.3 °C | 29.3 °C | 125.48 mm |
| August | 16.3 °C | 28.3 °C | 120.4 mm |
| September | 12.2 °C | 24.6 °C | 129.29 mm |
| October | 5.7 °C | 18 °C | 116.33 mm |
| November | 0.4 °C | 11.5 °C | 84.33 mm |
| December | -3.5 °C | 5.6 °C | 100.08 mm |
| Annual | 5.2 °C | 16.6 °C | 1248.17 mm |
| 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 7a : -17.8°C to -15°C |
| Plant Hardiness Zone - 2012 | Zone 6b : -20.6°C to -17.8°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |