Culbertson, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.8 °C (low) to 18.6 °C (high). Annual precipitation averages 556.8 Millimeters. Culbertson is located in USDA Plant Hardiness Zone 5b. 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 | -9.8 °C | 4.9 °C | 8.89 mm |
| February | -8.4 °C | 6.7 °C | 14.48 mm |
| March | -3.7 °C | 12.9 °C | 28.7 mm |
| April | 1.6 °C | 17.9 °C | 57.91 mm |
| May | 7.9 °C | 23.2 °C | 78.23 mm |
| June | 14 °C | 29.6 °C | 84.84 mm |
| July | 17.1 °C | 32.7 °C | 87.63 mm |
| August | 15.8 °C | 31.4 °C | 81.53 mm |
| September | 10.2 °C | 27.2 °C | 39.37 mm |
| October | 2.4 °C | 19.6 °C | 43.43 mm |
| November | -4.4 °C | 11.8 °C | 18.8 mm |
| December | -9.1 °C | 5.6 °C | 12.95 mm |
| Annual | 2.8 °C | 18.6 °C | 556.76 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |