Fairbury, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 5 °C (low) to 17.9 °C (high). Annual precipitation averages 794.3 Millimeters. Fairbury is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 21 - Apr. 30 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9 °C | 2.6 °C | 19.3 mm |
| February | -6.9 °C | 5.2 °C | 23.62 mm |
| March | -1.5 °C | 11.9 °C | 42.93 mm |
| April | 4.1 °C | 17.9 °C | 74.68 mm |
| May | 10.6 °C | 23.6 °C | 122.94 mm |
| June | 16.5 °C | 29.1 °C | 119.89 mm |
| July | 19 °C | 31.7 °C | 104.9 mm |
| August | 17.7 °C | 30.6 °C | 87.12 mm |
| September | 12.3 °C | 26.7 °C | 78.23 mm |
| October | 5.3 °C | 19.7 °C | 59.18 mm |
| November | -1.7 °C | 11.4 °C | 34.29 mm |
| December | -6.9 °C | 4.7 °C | 27.18 mm |
| Annual | 5 °C | 17.9 °C | 794.26 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -23.3°C to -20.6°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |