Santee, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 2.7 °C (low) to 15.4 °C (high). Annual precipitation averages 666.2 Millimeters. Santee is located in USDA Plant Hardiness Zone 5a. 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 | -12.4 °C | -1.3 °C | 13.97 mm |
| February | -10.4 °C | 1.5 °C | 19.56 mm |
| March | -4.4 °C | 8.2 °C | 34.8 mm |
| April | 1.9 °C | 15.5 °C | 75.69 mm |
| May | 8.6 °C | 21.9 °C | 99.57 mm |
| June | 14.8 °C | 27.7 °C | 94.49 mm |
| July | 17.5 °C | 30.5 °C | 76.45 mm |
| August | 16.2 °C | 29.3 °C | 81.03 mm |
| September | 10.9 °C | 25.2 °C | 67.56 mm |
| October | 3.3 °C | 17.3 °C | 58.67 mm |
| November | -3.9 °C | 8.3 °C | 25.65 mm |
| December | -9.7 °C | 0.9 °C | 18.8 mm |
| Annual | 2.7 °C | 15.4 °C | 666.24 mm |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 21 - Apr. 30 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |