Swanton, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 40.7 °F (low) to 63.4 °F (high). Annual precipitation averages 30.3 Inches. Swanton is located in USDA Plant Hardiness Zone 6a. The growing season typically runs from the last frost around Apr. 11 - Apr. 20 through the first frost around Oct. 11 - Oct. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 15.6 °F | 35.6 °F | 0.73 in. |
| February | 19.5 °F | 40.3 °F | 0.87 in. |
| March | 29.0 °F | 52.4 °F | 1.54 in. |
| April | 39.2 °F | 63.5 °F | 2.83 in. |
| May | 50.7 °F | 73.7 °F | 5.11 in. |
| June | 61.7 °F | 83.9 °F | 4.41 in. |
| July | 65.9 °F | 88.0 °F | 3.86 in. |
| August | 63.5 °F | 86.3 °F | 3.31 in. |
| September | 54.2 °F | 79.5 °F | 2.92 in. |
| October | 41.3 °F | 66.8 °F | 2.28 in. |
| November | 28.7 °F | 51.7 °F | 1.38 in. |
| December | 19.1 °F | 39.3 °F | 1.02 in. |
| Annual | 40.7 °F | 63.4 °F | 30.26 in. |
| Average First Frost Date | Oct. 11 - Oct. 20 |
| Average Last Frost Date | Apr. 11 - Apr. 20 |
| Average Days With Frost | 125-150 Days |
| Plant Hardiness Zone | Zone 6a : -10°F to -5°F |
| Plant Hardiness Zone - 2012 | Zone 5b : -15°F to -10°F |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |