Fontanelle, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.4 °C (low) to 15.9 °C (high). Annual precipitation averages 789.4 Millimeters. Fontanelle 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 | -10.4 °C | -0.2 °C | 17.27 mm |
| February | -8.3 °C | 2.2 °C | 23.37 mm |
| March | -2.4 °C | 9.2 °C | 42.67 mm |
| April | 3.6 °C | 16.4 °C | 81.28 mm |
| May | 10.3 °C | 22.1 °C | 117.35 mm |
| June | 16.5 °C | 27.8 °C | 124.71 mm |
| July | 18.6 °C | 29.6 °C | 82.55 mm |
| August | 17.3 °C | 28.5 °C | 97.03 mm |
| September | 12.1 °C | 25.1 °C | 82.55 mm |
| October | 5 °C | 18 °C | 57.15 mm |
| November | -2.1 °C | 9.3 °C | 34.54 mm |
| December | -7.7 °C | 2.2 °C | 28.96 mm |
| Annual | 4.4 °C | 15.9 °C | 789.43 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 | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |