Lykens, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.8 °F (low) to 60.9 °F (high). Annual precipitation averages 49.9 Inches. 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 | 19.5 °F | 36.0 °F | 3.26 in. |
| February | 20.8 °F | 38.6 °F | 2.76 in. |
| March | 28.5 °F | 47.6 °F | 4.01 in. |
| April | 39.0 °F | 60.9 °F | 4.16 in. |
| May | 48.8 °F | 71.0 °F | 4.32 in. |
| June | 58.0 °F | 79.3 °F | 4.72 in. |
| July | 61.9 °F | 83.8 °F | 4.83 in. |
| August | 60.2 °F | 82.3 °F | 4.57 in. |
| September | 52.9 °F | 75.5 °F | 5.16 in. |
| October | 41.9 °F | 63.5 °F | 4.61 in. |
| November | 32.5 °F | 51.5 °F | 3.65 in. |
| December | 25.1 °F | 40.7 °F | 3.88 in. |
| Annual | 40.8 °F | 60.9 °F | 49.93 in. |
| 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 : -5°F to 0°F |
| Plant Hardiness Zone - 2012 | Zone 6b : -5°F to 0°F |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |