Broken Bow, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.1 °C (low) to 16.3 °C (high). Annual precipitation averages 601.7 Millimeters. Broken Bow 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 Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.7 °C | 2.5 °C | 9.14 mm |
| February | -9.2 °C | 4.3 °C | 13.21 mm |
| March | -4.3 °C | 10.4 °C | 33.53 mm |
| April | 1 °C | 15.6 °C | 64.77 mm |
| May | 7.3 °C | 21.1 °C | 103.12 mm |
| June | 13.6 °C | 27 °C | 93.47 mm |
| July | 16.3 °C | 30.1 °C | 82.04 mm |
| August | 14.9 °C | 28.9 °C | 68.83 mm |
| September | 9.3 °C | 24.9 °C | 53.09 mm |
| October | 1.7 °C | 17.7 °C | 45.21 mm |
| November | -5 °C | 9.9 °C | 21.34 mm |
| December | -9.6 °C | 3.6 °C | 13.97 mm |
| Annual | 2.1 °C | 16.3 °C | 601.72 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |