Ithaca, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 4.3 °C (low) to 16.6 °C (high). Annual precipitation averages 793.5 Millimeters. Ithaca 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 | -10.3 °C | 0.4 °C | 17.78 mm |
| February | -8.1 °C | 3.2 °C | 23.37 mm |
| March | -2.3 °C | 10.2 °C | 41.66 mm |
| April | 3.7 °C | 17.1 °C | 78.23 mm |
| May | 10.2 °C | 22.8 °C | 121.41 mm |
| June | 16.2 °C | 28.3 °C | 124.97 mm |
| July | 18.4 °C | 30.4 °C | 83.57 mm |
| August | 16.9 °C | 29.3 °C | 99.82 mm |
| September | 11.7 °C | 25.8 °C | 78.49 mm |
| October | 4.8 °C | 18.7 °C | 58.93 mm |
| November | -2.3 °C | 10.1 °C | 36.07 mm |
| December | -7.7 °C | 2.9 °C | 29.21 mm |
| Annual | 4.3 °C | 16.6 °C | 793.51 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 |