Luzerne, Pennsylvania has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 4.4 °C (low) to 16 °C (high). Annual precipitation averages 1118.1 Millimeters. Luzerne is located in USDA Plant Hardiness Zone 6b. 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 | -7.6 °C | 1.9 °C | 72.9 mm |
| February | -7 °C | 3.4 °C | 61.72 mm |
| March | -2.7 °C | 8.2 °C | 75.69 mm |
| April | 3.1 °C | 15.8 °C | 93.73 mm |
| May | 8.8 °C | 22.1 °C | 94.49 mm |
| June | 13.9 °C | 26.5 °C | 118.36 mm |
| July | 16.3 °C | 29.2 °C | 112.01 mm |
| August | 15.4 °C | 28.1 °C | 104.39 mm |
| September | 11.4 °C | 24.2 °C | 118.36 mm |
| October | 5.3 °C | 17.3 °C | 108.46 mm |
| November | 0.3 °C | 10.7 °C | 75.44 mm |
| December | -4 °C | 4.8 °C | 82.55 mm |
| Annual | 4.4 °C | 16 °C | 1118.1 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 6b : -20.6°C to -17.8°C |
| Plant Hardiness Zone - 2012 | Zone 6a : -23.3°C to -20.6°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |