Valley, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.5 °C (low) to 16.4 °C (high). Annual precipitation averages 822.7 Millimeters. Valley 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 | -10.2 °C | 0.3 °C | 19.81 mm |
| February | -8 °C | 3 °C | 27.18 mm |
| March | -2.2 °C | 10 °C | 43.69 mm |
| April | 3.8 °C | 16.9 °C | 81.03 mm |
| May | 10.4 °C | 22.6 °C | 123.95 mm |
| June | 16.5 °C | 28.2 °C | 126.75 mm |
| July | 18.8 °C | 30.2 °C | 87.38 mm |
| August | 17.3 °C | 29.1 °C | 102.11 mm |
| September | 12.1 °C | 25.6 °C | 80.52 mm |
| October | 5.1 °C | 18.4 °C | 62.23 mm |
| November | -1.9 °C | 9.8 °C | 35.05 mm |
| December | -7.6 °C | 2.6 °C | 33.02 mm |
| Annual | 4.5 °C | 16.4 °C | 822.72 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 | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |