Palmerton, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 16.5 °C (high). Annual precipitation averages 1264.4 Millimeters. Palmerton is located in USDA Plant Hardiness Zone 7a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -6.6 °C | 2.9 °C | 89.41 mm |
| February | -5.9 °C | 4.6 °C | 68.33 mm |
| March | -2 °C | 9.1 °C | 90.93 mm |
| April | 3.7 °C | 16.4 °C | 99.82 mm |
| May | 9.4 °C | 22.2 °C | 102.62 mm |
| June | 14.4 °C | 26.7 °C | 126.75 mm |
| July | 17.1 °C | 29.2 °C | 125.22 mm |
| August | 16.1 °C | 28.2 °C | 120.65 mm |
| September | 11.9 °C | 24.5 °C | 136.65 mm |
| October | 5.5 °C | 17.8 °C | 117.35 mm |
| November | 0.3 °C | 11.4 °C | 85.34 mm |
| December | -3.7 °C | 5.3 °C | 101.35 mm |
| Annual | 5 °C | 16.5 °C | 1264.42 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 75-100 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 |