Cairo, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.8 °C (low) to 16.8 °C (high). Annual precipitation averages 698.3 Millimeters. Cairo is located in USDA Plant Hardiness Zone 5b. 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 | -9.6 °C | 1.9 °C | 14.48 mm |
| February | -7.9 °C | 4 °C | 17.78 mm |
| March | -2.7 °C | 10.7 °C | 38.1 mm |
| April | 3 °C | 16.6 °C | 72.39 mm |
| May | 9.3 °C | 22.3 °C | 115.82 mm |
| June | 15.3 °C | 28.1 °C | 104.14 mm |
| July | 17.9 °C | 30.4 °C | 87.38 mm |
| August | 16.6 °C | 29.2 °C | 86.61 mm |
| September | 11.3 °C | 25.6 °C | 58.17 mm |
| October | 4 °C | 18.5 °C | 52.83 mm |
| November | -3 °C | 10.4 °C | 28.96 mm |
| December | -8.1 °C | 3.6 °C | 21.59 mm |
| Annual | 3.8 °C | 16.8 °C | 698.25 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 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5b : -26.1°C to -23.3°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |