Lykens, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.9 °C (low) to 16.1 °C (high). Annual precipitation averages 1268.2 Millimeters. Lykens is located in USDA Plant Hardiness Zone 6b. 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 | -6.9 °C | 2.2 °C | 82.8 mm |
| February | -6.2 °C | 3.7 °C | 70.1 mm |
| March | -1.9 °C | 8.7 °C | 101.85 mm |
| April | 3.9 °C | 16.1 °C | 105.66 mm |
| May | 9.3 °C | 21.7 °C | 109.73 mm |
| June | 14.4 °C | 26.3 °C | 119.89 mm |
| July | 16.6 °C | 28.8 °C | 122.68 mm |
| August | 15.7 °C | 27.9 °C | 116.08 mm |
| September | 11.6 °C | 24.2 °C | 131.06 mm |
| October | 5.5 °C | 17.5 °C | 117.09 mm |
| November | 0.3 °C | 10.8 °C | 92.71 mm |
| December | -3.8 °C | 4.8 °C | 98.55 mm |
| Annual | 4.9 °C | 16.1 °C | 1268.2 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 100-125 Days |
| Plant Hardiness Zone | Zone 6b : -20.6°C to -17.8°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 |