Alliance, Nebraska has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from 34.1 °F (low) to 61.6 °F (high). Annual precipitation averages 16.2 Inches. Alliance is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | 13.4 °F | 38.3 °F | 0.3 in. |
| February | 15.4 °F | 40.8 °F | 0.45 in. |
| March | 23.8 °F | 51.1 °F | 0.68 in. |
| April | 31.8 °F | 58.5 °F | 2.01 in. |
| May | 42.2 °F | 68.3 °F | 2.94 in. |
| June | 52.4 °F | 80.4 °F | 2.71 in. |
| July | 58.7 °F | 88.2 °F | 2.14 in. |
| August | 56.3 °F | 86.1 °F | 1.7 in. |
| September | 46.3 °F | 77.2 °F | 1.43 in. |
| October | 33.2 °F | 62.1 °F | 1.09 in. |
| November | 22.0 °F | 49.3 °F | 0.4 in. |
| December | 13.7 °F | 38.9 °F | 0.36 in. |
| Annual | 34.1 °F | 61.6 °F | 16.21 in. |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5a : -20°F to -15°F |
| Plant Hardiness Zone - 2012 | Zone 5a : -20°F to -15°F |
| Current Drought Conditions | Extreme Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |