Holbrook, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3 °C (low) to 18.5 °C (high). Annual precipitation averages 591.8 Millimeters. Holbrook 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 | -10.1 °C | 4.5 °C | 10.67 mm |
| February | -8.4 °C | 6.6 °C | 16.26 mm |
| March | -3.5 °C | 12.9 °C | 29.97 mm |
| April | 1.8 °C | 17.9 °C | 57.91 mm |
| May | 8.4 °C | 23.3 °C | 88.39 mm |
| June | 14.6 °C | 29.4 °C | 90.68 mm |
| July | 17.4 °C | 32 °C | 93.98 mm |
| August | 16 °C | 30.7 °C | 76.96 mm |
| September | 10.4 °C | 27.1 °C | 42.67 mm |
| October | 2.6 °C | 19.9 °C | 45.97 mm |
| November | -4.5 °C | 11.8 °C | 22.1 mm |
| December | -9.2 °C | 5.4 °C | 16.26 mm |
| Annual | 3 °C | 18.5 °C | 591.82 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |