Berwyn, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.2 °C (low) to 16.4 °C (high). Annual precipitation averages 629.7 Millimeters. Berwyn is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.9 °C | 2.3 °C | 11.68 mm |
| February | -9.3 °C | 4.2 °C | 15.75 mm |
| March | -4.3 °C | 10.4 °C | 34.54 mm |
| April | 1.2 °C | 15.8 °C | 70.61 mm |
| May | 7.5 °C | 21.3 °C | 103.12 mm |
| June | 13.7 °C | 27.2 °C | 95.5 mm |
| July | 16.5 °C | 30.2 °C | 82.04 mm |
| August | 15.1 °C | 29.1 °C | 74.93 mm |
| September | 9.5 °C | 25.1 °C | 54.1 mm |
| October | 1.9 °C | 17.8 °C | 47.75 mm |
| November | -4.8 °C | 9.9 °C | 23.37 mm |
| December | -9.6 °C | 3.5 °C | 16.26 mm |
| Annual | 2.2 °C | 16.4 °C | 629.65 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |