Morrill, Nebraska has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 1.3 °C (low) to 17.4 °C (high). Annual precipitation averages 384.3 Millimeters. Morrill is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 11 - May 20 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -9.4 °C | 4.7 °C | 6.1 mm |
| February | -8.5 °C | 6.1 °C | 12.19 mm |
| March | -4.2 °C | 11.5 °C | 20.57 mm |
| April | -0.1 °C | 15.7 °C | 47.75 mm |
| May | 5.8 °C | 21.2 °C | 73.91 mm |
| June | 11.3 °C | 27.9 °C | 61.98 mm |
| July | 14.8 °C | 31.8 °C | 41.66 mm |
| August | 13.3 °C | 30.8 °C | 27.94 mm |
| September | 7.7 °C | 25.9 °C | 36.58 mm |
| October | 0.4 °C | 17.9 °C | 34.54 mm |
| November | -5.5 °C | 10.5 °C | 11.68 mm |
| December | -9.9 °C | 5 °C | 9.4 mm |
| Annual | 1.3 °C | 17.4 °C | 384.3 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |