Lexington, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 3.1 °C (low) to 17.3 °C (high). Annual precipitation averages 609.1 Millimeters. Lexington 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 | -9.6 °C | 3.1 °C | 10.16 mm |
| February | -8.2 °C | 5.3 °C | 16.76 mm |
| March | -3.2 °C | 11.4 °C | 31.5 mm |
| April | 2.1 °C | 16.7 °C | 63.25 mm |
| May | 8.3 °C | 22.3 °C | 97.79 mm |
| June | 14.4 °C | 28.3 °C | 91.44 mm |
| July | 17.1 °C | 30.9 °C | 93.98 mm |
| August | 15.8 °C | 29.4 °C | 79.25 mm |
| September | 10.5 °C | 26.1 °C | 42.93 mm |
| October | 3.1 °C | 18.9 °C | 46.23 mm |
| November | -3.9 °C | 11.1 °C | 20.32 mm |
| December | -8.7 °C | 4.5 °C | 15.49 mm |
| Annual | 3.1 °C | 17.3 °C | 609.1 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 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 | Severe Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |