Berlin, Pennsylvania has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.2 °C (low) to 13.8 °C (high). Annual precipitation averages 1123.2 Millimeters. Berlin is located in USDA Plant Hardiness Zone 5b. 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 | -9.5 °C | 0.6 °C | 84.58 mm |
| February | -8.8 °C | 2.3 °C | 75.44 mm |
| March | -5.1 °C | 7 °C | 95.76 mm |
| April | 1.3 °C | 14 °C | 98.04 mm |
| May | 6.8 °C | 19.3 °C | 118.11 mm |
| June | 11.4 °C | 23.6 °C | 116.33 mm |
| July | 13.6 °C | 25.7 °C | 102.11 mm |
| August | 12.7 °C | 25 °C | 97.03 mm |
| September | 8.6 °C | 21.4 °C | 92.96 mm |
| October | 3.2 °C | 15.1 °C | 81.53 mm |
| November | -2.1 °C | 8.6 °C | 74.68 mm |
| December | -5.7 °C | 2.9 °C | 86.61 mm |
| Annual | 2.2 °C | 13.8 °C | 1123.18 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |