Sidney, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 1.5 °C (low) to 17.5 °C (high). Annual precipitation averages 439.7 Millimeters. Sidney is located in USDA Plant Hardiness Zone 5b. 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 | -9.6 °C | 5 °C | 7.37 mm |
| February | -8.6 °C | 6.3 °C | 11.94 mm |
| March | -4.4 °C | 11.7 °C | 24.38 mm |
| April | -0.2 °C | 15.7 °C | 47.5 mm |
| May | 5.7 °C | 20.9 °C | 73.41 mm |
| June | 11.5 °C | 27.8 °C | 73.41 mm |
| July | 15.1 °C | 31.8 °C | 59.18 mm |
| August | 13.6 °C | 30.6 °C | 49.28 mm |
| September | 8.4 °C | 25.9 °C | 39.88 mm |
| October | 1.1 °C | 17.9 °C | 30.23 mm |
| November | -5 °C | 10.7 °C | 12.95 mm |
| December | -9.6 °C | 5.1 °C | 10.16 mm |
| Annual | 1.5 °C | 17.5 °C | 439.69 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 11 - May 20 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |