Sterling, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.7 °C (low) to 17.3 °C (high). Annual precipitation averages 818.6 Millimeters. Sterling 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 | -9.8 °C | 1.7 °C | 20.32 mm |
| February | -7.3 °C | 4.5 °C | 27.94 mm |
| March | -1.8 °C | 11.2 °C | 50.8 mm |
| April | 4.2 °C | 17.5 °C | 73.66 mm |
| May | 10.4 °C | 23.2 °C | 140.46 mm |
| June | 16.4 °C | 28.6 °C | 113.03 mm |
| July | 18.8 °C | 30.9 °C | 100.33 mm |
| August | 17.3 °C | 30.1 °C | 83.82 mm |
| September | 12.1 °C | 26.2 °C | 75.95 mm |
| October | 5.1 °C | 19.4 °C | 64.26 mm |
| November | -1.9 °C | 10.8 °C | 37.34 mm |
| December | -7.3 °C | 3.9 °C | 30.73 mm |
| Annual | 4.7 °C | 17.3 °C | 818.64 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |