Chadron, Nebraska has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 34.6 °F (low) to 62.2 °F (high). Annual precipitation averages 18.4 Inches. Chadron 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 | 13.5 °F | 37.6 °F | 0.44 in. |
| February | 15.2 °F | 40.1 °F | 0.56 in. |
| March | 23.7 °F | 51.1 °F | 1.05 in. |
| April | 32.0 °F | 59.6 °F | 2.17 in. |
| May | 43.0 °F | 68.7 °F | 3.11 in. |
| June | 53.1 °F | 81.3 °F | 3.03 in. |
| July | 59.8 °F | 89.3 °F | 2.08 in. |
| August | 57.4 °F | 88.2 °F | 1.7 in. |
| September | 46.7 °F | 78.8 °F | 1.62 in. |
| October | 33.9 °F | 63.4 °F | 1.49 in. |
| November | 22.4 °F | 49.7 °F | 0.63 in. |
| December | 14.1 °F | 38.3 °F | 0.52 in. |
| Annual | 34.6 °F | 62.2 °F | 18.4 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 | Dfb - Humid Continental Mild Summer, Wet All Year |