Berwyn, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 36 °F (low) to 61.5 °F (high). Annual precipitation averages 24.8 Inches. 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 | 12.4 °F | 36.2 °F | 0.46 in. |
| February | 15.3 °F | 39.5 °F | 0.62 in. |
| March | 24.3 °F | 50.7 °F | 1.36 in. |
| April | 34.1 °F | 60.4 °F | 2.78 in. |
| May | 45.5 °F | 70.4 °F | 4.06 in. |
| June | 56.7 °F | 80.9 °F | 3.76 in. |
| July | 61.7 °F | 86.4 °F | 3.23 in. |
| August | 59.2 °F | 84.4 °F | 2.95 in. |
| September | 49.1 °F | 77.1 °F | 2.13 in. |
| October | 35.4 °F | 64.0 °F | 1.88 in. |
| November | 23.3 °F | 49.9 °F | 0.92 in. |
| December | 14.8 °F | 38.3 °F | 0.64 in. |
| Annual | 36 °F | 61.5 °F | 24.79 in. |
| 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 : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |