Milligan, Nebraska has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 39.8 °F (low) to 62.7 °F (high). Annual precipitation averages 29.2 Inches. Milligan is located in USDA Plant Hardiness Zone 6a. 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 | 14.7 °F | 35.1 °F | 0.68 in. |
| February | 18.3 °F | 39.8 °F | 0.77 in. |
| March | 27.7 °F | 52.4 °F | 1.48 in. |
| April | 38.0 °F | 63.3 °F | 2.58 in. |
| May | 50.0 °F | 73.0 °F | 5.02 in. |
| June | 60.9 °F | 83.1 °F | 4.24 in. |
| July | 65.0 °F | 86.8 °F | 3.67 in. |
| August | 62.6 °F | 84.7 °F | 3.45 in. |
| September | 53.5 °F | 78.7 °F | 2.77 in. |
| October | 40.7 °F | 66.1 °F | 2.26 in. |
| November | 27.9 °F | 51.2 °F | 1.26 in. |
| December | 18.6 °F | 38.5 °F | 0.98 in. |
| Annual | 39.8 °F | 62.7 °F | 29.16 in. |
| 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 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 |