Lock Haven, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.4 °C (low) to 16.3 °C (high). Annual precipitation averages 1038.4 Millimeters. Lock Haven 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 | -7.2 °C | 1.8 °C | 69.85 mm |
| February | -6.7 °C | 3.7 °C | 54.86 mm |
| March | -2.7 °C | 9 °C | 76.71 mm |
| April | 3 °C | 16.8 °C | 90.42 mm |
| May | 8.8 °C | 22.9 °C | 97.03 mm |
| June | 13.9 °C | 27.1 °C | 93.73 mm |
| July | 16.3 °C | 29.6 °C | 107.19 mm |
| August | 15.4 °C | 28.4 °C | 104.65 mm |
| September | 11.4 °C | 24.3 °C | 106.68 mm |
| October | 5.2 °C | 17.7 °C | 89.15 mm |
| November | -0.2 °C | 10.4 °C | 73.91 mm |
| December | -4.1 °C | 4.3 °C | 74.17 mm |
| Annual | 4.4 °C | 16.3 °C | 1038.35 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |