Waco, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.1 °C (low) to 16.8 °C (high). Annual precipitation averages 735.1 Millimeters. Waco 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. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.1 °C | 1.3 °C | 16 mm |
| February | -7.9 °C | 3.8 °C | 18.54 mm |
| March | -2.7 °C | 10.7 °C | 40.64 mm |
| April | 3.1 °C | 17.1 °C | 67.31 mm |
| May | 9.8 °C | 22.8 °C | 127.76 mm |
| June | 15.8 °C | 28.4 °C | 106.93 mm |
| July | 18.2 °C | 30.5 °C | 94.74 mm |
| August | 16.8 °C | 29.2 °C | 88.9 mm |
| September | 11.7 °C | 25.9 °C | 61.98 mm |
| October | 4.5 °C | 18.7 °C | 54.36 mm |
| November | -2.7 °C | 10.4 °C | 33.02 mm |
| December | -7.9 °C | 3.2 °C | 24.89 mm |
| Annual | 4.1 °C | 16.8 °C | 735.07 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 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 |