Niobrara, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.6 °C (low) to 16 °C (high). Annual precipitation averages 639.8 Millimeters. Niobrara is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -12.4 °C | -0.4 °C | 12.45 mm |
| February | -10.4 °C | 2.3 °C | 17.78 mm |
| March | -4.6 °C | 8.8 °C | 32.51 mm |
| April | 1.7 °C | 16.1 °C | 74.68 mm |
| May | 8.4 °C | 22.3 °C | 96.27 mm |
| June | 14.6 °C | 28.2 °C | 90.42 mm |
| July | 17.4 °C | 31.2 °C | 77.72 mm |
| August | 16.1 °C | 30 °C | 80.26 mm |
| September | 10.7 °C | 25.6 °C | 63.25 mm |
| October | 3.1 °C | 17.7 °C | 56.39 mm |
| November | -3.9 °C | 8.7 °C | 23.37 mm |
| December | -9.7 °C | 1.5 °C | 14.73 mm |
| Annual | 2.6 °C | 16 °C | 639.83 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| 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 | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |