Tarnov, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.2 °C (low) to 15.9 °C (high). Annual precipitation averages 721.6 Millimeters. Tarnov 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 | -10.9 °C | 0.5 °C | 15.49 mm |
| February | -8.9 °C | 2.9 °C | 17.02 mm |
| March | -3.5 °C | 9.6 °C | 41.4 mm |
| April | 2.4 °C | 16.2 °C | 75.44 mm |
| May | 9.1 °C | 22.1 °C | 116.59 mm |
| June | 15.1 °C | 27.6 °C | 118.11 mm |
| July | 17.4 °C | 29.7 °C | 83.57 mm |
| August | 16.1 °C | 28.4 °C | 83.82 mm |
| September | 10.8 °C | 25 °C | 65.02 mm |
| October | 3.5 °C | 17.8 °C | 54.1 mm |
| November | -3.7 °C | 9.2 °C | 30.23 mm |
| December | -8.8 °C | 2.3 °C | 20.83 mm |
| Annual | 3.2 °C | 15.9 °C | 721.62 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 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Moderate Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |